West Bengal Police SI (Prelims) Official Paper (Held On : 26 Aug 2018) (Previous Year Paper)

The correct answer is Microwaves.

Key Points

• Microwaves are used for telecommunication.
• It modulates the mechanical waves emitted by our vocal cords. Great physicists such as Hertz, Tesla, Branly, and Marconi understood that using electromagnetic waves to convey information through the air was possible.
• Many types of EMF are used to convey information over a distance, the most common being radio waves, also called radio frequencies.
• This is a broad spectrum ranging from tens of kilohertz to 300 gigahertz.

Important Points

• Ultraviolet (UV) light has shorter wavelengths than visible light.
• The wavelength range is 100-400 nm.
• UV waves are invisible to the human eye, but some insects, such as bumblebees, can see them.
• This is similar to how a dog can hear the sound of a whistle just outside the hearing range of humans.
• These invisible rays are part of the energy that comes from the sun, which can burn the skin and cause skin cancer.
• It is widely used in industrial processes and in medical and dental practices for a variety of purposes, such as killing bacteria, creating fluorescent effects, curing inks and resins, phototherapy, and suntanning.
• X-rays have much higher energy and much shorter wavelengths than ultraviolet light.
• X-rays have very small wavelengths, between 0.01 to 10 nanometers.
• The use of x-rays is to check for fractures (broken bones), and chest x-rays can spot pneumonia. Mammograms use x-rays to look for breast cancer.
• Infrared waves have longer wavelengths than visible light and can pass through dense regions of gas and dust in space with less scattering and absorption.
• Its spectrum is around 700 nanometers, to 1 millimeter.
• The heat that we feel from sunlight, a fire, a radiator, or a warm sidewalk is infrared.

The correct answer is Acrophobia.

• Acrophobia is described as an intense fear of heights that can cause significant anxiety and panic.

Important Points

• Anglophobia describes dislike or fear or hatred towards England or English people.
• Ergophobia is characterized by an irrational and excessive fear of work.
• Agoraphobia is a fear of places and situations that might cause panic, helplessness, or embarrassment.

Additional Information

• Some common phobias list:

Given:

The ratio of present ages of three persons are in the ratio 4 : 7 : 9

8 years ago sum of their ages were = 56

Calculation:

Let us take the ratio of ages be 4x, 7x, 9x respectively

Ages of the person before 8 years = (4x - 8), (7x - 8), (9x - 8)

According to the question

⇒ (4x - 8) + (7x - 8) + (9x - 8) = 56 

⇒ 20x - 24 = 56

⇒ 20x = 80  

⇒ x = 4

Substituting the values in ratio

⇒ 4 × 4 : 7 × 4 : 9 × 4 = 16 : 28 : 36

∴ The present ages of 3 persons are 16, 28, 36

Given:

A can do a work = 10 days

B can do a work = 12 days

C can do a work = 15 days

Formula Used: 

In the LCM method 

Number of days = total work/efficiency

Calculation:

LCM of (10, 12, 15) = 60 units

⇒The efficiency of A = 6 units

⇒The efficiency of B = 5 units

⇒The efficiency of C = 4 units

First 2 days (A + B + C) = (6+5+4) × 2 ⇒ 30units 

Last 4 days work done by B alone = 5 × 4 = 20 units

Remaining Work = 60 - (30 + 20) ⇒ 10 units

The remaining work is completed by B and C = 10/(5+4) ⇒ 10/9 days

So total number of days = 2 + 4 + 10/9 ⇒ 64/9 days 

 ∴ Work was finished in 64/9 days

The correct answer is Weight lifting.

Key Points

• Mirabai Chanu won India’s first gold medal in the Commonwealth Games.
• The 23-year-old won her first medal in the 2014 Commonwealth Games, the silver in the women’s 48-kg weight class.
• She got the Rajiv Gandhi Khel Ratna award in 2018.
• She clinched a gold medal at the EGAT Cup in Thailand, making a strong comeback from the lower back injury that kept her out of action for more than half of 2018.

Given:

Length of the train = 100 metre 

Speed of Train = 30 km/hr 

Formula Used:

Distance = Speed × Time

Calculation:

Let us convert the speed from km/hr to m/s 

30 × 5/18 = 25/3 m/s 

If a train crosses a man then the distance travelled by train will be equal to the length of the train

100 = 25/3 × time

⇒ 300/25 = 12 sec

∴ The time taken by a 100-metre long train to cross a man will be 12 sec

Given:

A Time take by a tap to fill a tank = 6 hours

Work is done by the tap = 1/2

Similar three taps are opened with the same efficiency

Formula Used:

In the LCM method 

Number of days = Total work\efficiency

Calculation:

Lcm for 6 = 6 units

⇒Total work = 6 units

⇒The efficiency of 1^st tap = 1 

⇒Half work is done = 3 units

Time taken by a Tap to fill half tank = 3/1 ⇒ 3hours

Remaining work = 6 - 3 ⇒ 3 units 

3 extra taps with similar efficiency are opened

⇒The total efficiency of all 4 taps = 4

Number of hours to fill = remaining work/Total efficiency of all taps

Time take by all 4 taps = (3/4) × 60⇒ 45 minutes 

∴ The total time taken by all taps to fill a tank = 3 hours and 45 minutes

Alternate method:

A Time take by a tap to fill a tank = 6 hours

Time taken by tap to fill a tank in 1 hour = 1/6

Let us take the Total work to be  1unit

time taken by the tap to fill half tank = 6 × 1/2 ⇒ 3 hours      ----(ii)

Work remaining = 1/2 unit

similar three taps are opened 

Time take to complete the remaining work by the four taps be x

4 × (1/6)x = 1/2  

x = 3/4 hour ⇒ 45 minutes      ----(ii)

Adding (i) and (ii) we get

∴ Total time taken by all taps to fill a tank is 3 hour and 45 minutes

The correct answer is Rural development.

Important Points

• "NABARD" means 'National Bank for Agriculture and Rural Development'.
• It is not a wholly own subsidiary of RBI now because RBI sold 99% of its stake to GOI.
• Its headquarter is in Mumbai, India.
• The Chairman of NABARD is Dr. Harsh Kumar Bhanwala.
• NABARD was founded on 12 July 1982.
• The main role of NABARD is to provide and manage credit flow for the development of the rural area.
• National Bank for Agriculture and Rural Development (NABARD) was approved by the Parliament through Act 61 of 1981.
• It is the development Bank of the Nation for Fostering Rural Prosperity.
• It promotes sustainable and equitable agriculture and rural development through participative financial and non-financial interventions, innovations, technology and institutional development for securing prosperity.

The correct answer is Rs. 1.

Key Points

• The Government of India prints One Rupee currency notes.
• The Reserve Bank of India does not issue one rupee like other Indian currency notes (Rs. 100, Rs. 500, Rs. 2000).
• The size of this one rupee currency note will be rectangular 9.7 x 6.3 cms.
• It will be 110 microns thick while its weight will be 90 GSM (Grams per Square Meter).
• The observe side of the One Rupee Currency note will contain ‘Bharat Sarkar’ at the top in Hindi while ‘Government of India’ will be written in English below.
• The language panel on Indian rupee banknotes display the denomination of the note in 15 of the 22 official languages of India .
• An image of the oil exploration platform ‘Sagar Samrat’ will also be there.

The correct answer is 6 months.

Key Points

• President's removal from office is to be under the procedure prescribed in Article 61 of the Constitution.
• He may, by writing under his hand addressed to the Vice-President, resign his office.
• The Vice-President is ex-officio Chairman of the Rajya Sabha and acts as President when the latter is unable to discharge his functions due to absence, illness, or any other cause, or till the election of a new President (to be held within 6 months when a vacancy is caused by death, resignation or removal or otherwise of President).
• When the President dies in office and Vice President takes over as President, he can continue serving as the President for a maximum of 6 months within which a new President shall be elected.

 

Important Points

• The Vice-President is elected by an electoral college consisting of members of both Houses of Parliament.
• A person cannot be elected as Vice-President unless he -

1. He/ She is a citizen of India.
2. Has completed the age of 35 years.
3. He/ She is qualified for election as a member of the Council of States (Rajya Sabha).

The correct answer is ITBP.

Key Points

• India shares its borders with seven different countries, Pakistan, Afghanistan, China, Nepal, Bhutan, Bangladesh & Myanmar.
• These six international borders are guarded by different paramilitary forces.
• The Central Armed Police Forces are more commonly known as the paramilitary forces and come under the Ministry of Home Affairs.

Important Points

• Guarding the International Borders with Six Countries:

The pattern followed here is:

Add 2 on place value of every alphabet:

Similarly "SCORE" will be coded as,

Hence, the correct answer is "UEQTG".

The correct answer is 42^nd Amendment.

Key Points

• This amendment put restrictions on the review powers of the Judiciary.
• The amendment made changes to the Preamble, to the seventh schedule of the Constitution, and 53 articles of the constitution.
• Due to these voluminous changes in the Constitution, the 42^nd amendment was called a mini-constitution.
• This amendment made the use of the power fundamental duties by the people of India to the nation.

Important Points

• The 56^th Amendment confers Statehood on Goa and forms a new Union Territory of Daman and Diu.
• Goa thus became the 25th State of the Indian Republic.
• The Constitution (45^th Amendment) Bill, re-numbered as the 44^th Amendment came into force on April 30, 1979, when the President gave his assent.
• The Act removes major distortions in the Constitution introduced during the Emergency.
• The duration of the Lok Sabha and State Legislative Assemblies has been reduced from six to five years.
• The Right to Property ceases to be a Fundamental Right and becomes only a legal right according to the Constitution 44th Amendment.
• It provides safeguards against future subversion of the Constitution for establishing an authoritarian regime.
  

It contains provisions that are designed to make it impossible to impose the kind of emergency the country had experienced for 19 months.

Given:

2M + 3B = 10 Days

3M + 2B = 8 Days

Concept:

Find Individual efficiency of each men and boy and using it to find total time taken to complete the same task

Calculation:

Taking L.C.M  of above equations we get total unit of work as 40 Days

Efficiencies,

2M + 3B = 4

3M + 2B = 5

Solving above equations we get 

M = 7/5

B = 2/5

Efficiency of 2M + 1B = 16/5

Conclusion:

So, Time taken = 40/(16/5) = 200/16 =12.5 Days

Let the two numbers be a and b.

Given:

a>13 and b>13

L.C.M = 273

H.C.F = 13

Concept:

Since the H.C.F. is 13, we can write

a = 13x

b = 13y

Calculation:

for any two positive integers x and y.

L.C.M. = 273. We can write

13 × x × y = 273

xy = 21 

13x >13 

⇒ x >1

13y >13

⇒ y >1

We need to find x and y.

So, factors of 21 are 1,3,7 and 21.

(x,y) can't be (1,21) or (21,1) since x and y should be greater than 1.

Therefore, (x,y) = (3,7) or (7,3)

Thus,

a = 13×3 = 39

b = 13×7 = 91

Thus, (a,b) = (39,91) or (91,39)

Sum of a and b = (a+b) = 39+91 = 130

The pattern followed here is : The place value of letter + 2

A is written as C, B is written as D, C is written as E, and so on up to Z.

So the code for "CHIKMAGALUR" is:

Hence, the correct answer is "EJKMOCICNWT".

The correct answer is Calcutta High Court.

Key Points

• The Calcutta High Court is the oldest in India.
• It has jurisdiction over the state of West Bengal and the Union Territory of the Andaman and Nicobar Islands.
• The High Court building's design is based on the Cloth Hall, Ypres, in Belgium.
• The court has a sanctioned judge strength of 72

Important Points

 

Additional Information

• Calcutta High Court was established as the High Court of Judicature at Fort William on July 1, 1862, under the High Courts Act, 1861.
• Barnes Peacock was the first Chief Justice of the High Court.
• The current Chief justice of Calcutta high court is JJustice T. S. Sivagnanam
• Manjula Chellur is the first woman chief justice of the Kolkata High Court.

The correct answer is Spain.

• Rafael Nadal, in full Rafael Nadal Parera, is a Spanish tennis player.
• He is especially noted for his performance on clay court.

 

Additional Information

• List of Tennis player and their nationality:

The correct answer is India and France.

• The first phase of Indo-French joint naval exercise Varuna 2018 began on March 19, 2018, at the Mormugao Port Trust (MPT) in Vasco da Gama, Goa.
• The exercise is being held in the Arabian Sea, off the Goa coast.
• French submarine and frigate Jean de Vienne and Indian destroyer INS Mumbai and frigate Trikand with their integral helicopters will be participating in the exercise.

Important Points

• Important Military Exercises By Indian Navy:

Given:

Final mixture price = Rs.153

Concept:

Assume that the Third Variety of Tea quantity is X.

Calculation: 

(1261+1351+2*x)/(1+1+2)= 153

⇒ 261 + 2x = 4×153 

⇒ 2x = 612-261

⇒ x = 351/2

⇒ x =175.50

∴ Price of third variety tea is Rs. 175.50

n examination failed

Only In Bengali = 17 -5= 12%

Only In English =18 -5= 13%

In both subject = 5%

Total students failed = 30%

Percentage of passed students = 100-30= 70%

The correct answer is parabolic concave mirror.

Key Points

• Concave mirrors are spherical mirrors that curve inward like a spoon.
• They create the illusion of largeness.
• For a diverging or concave mirror, the focal length is always negative.
• Concave Mirror used for Shaving mirrors, Ophthalmoscope, Astronomical telescopes, Solar furnaces, etc.
• A concave mirror is used for this purpose because it produces a parallel beam of light when the light source is present at its principle focus.
• The headlight is present at focus and after reflection, it gives a parallel ray of light on the road.

 

Important Points

The correct answer is A - 3, B - 4, C - 1, D - 2.

Key Points

• Kangsabati River rises from the Chota Nagpur plateau.
• It passes through the districts of Purulia, Bankura, and Paschim Medinipur in West Bengal and draining in the Bay of Bengal.
• Tista and Karala rivers are flowing beside Jalpaiguri town.
• Source: Tso Lhamo Lake (Sikkim).
• Mouth: Brahmaputra.
• The Ganges River is a 1569 mile long river flowing across India and Bangladesh into the Bay of Bengal.
• The Source of The Ganga river is Himalayas' Gangotri Glacier.
• The Source of the Hooghly river is the Ganga river and the mouth in the Bay of Bengal.
• Ganga Basin including Sundarban Area (74,732 km²).
• The Ganges River flows through several states including Uttarakhand, Uttar Pradesh, Bihar, Jharkhand, and West Bengal.
• The Ganges River's main tributaries include Ramganga, Gomti, Ghaghara, Gandaki, Burhi Gandak, Koshi, Mahananda, Yamuna, Tamsa, Son, and Punpun.
• Torsa River rises from the Chumbi Valley in Tibet, China, where it is known as Machu.
• It flows into Bhutan, where it is known as the Amo Chu.
• Mouth: Brahmaputra.

The correct answer is Sheikh Hasina.

• Prime Minister of Bangladesh Sheikh Hasina, be honored with the prestigious Global Women’s Leadership Award 2018 in Sydney, Australia.
• The Global Summit of Women focuses on women's advancement in the global economy and has been connecting women worldwide for 27 years.

 

Important Points

• Nirmala Sitharaman is the Minister of Finance of India, the second woman Finance Minister.
• Nirmala Sitharaman was the second woman to hold the post of Defence Minister after Indira Gandhi and the first to hold this office full time.
• H. E. Joyce Banda, a Malawian politician who served as vice president (2009–12) and president (2012–14) of Malawi.
• She was the first woman to serve as head of state anywhere in Southern Africa.
• Sushma Swaraj is the former Minister of External Affairs of India.
• She was the second woman to hold the office, after Indira Gandhi.
• She served as the first female Chief Minister of Delhi for a short period in 1998.
• She is the first and only female MP till date to be honored with the 'Outstanding Parliamentarian Award' in 2004.

The correct answer is Little Boy.

Key Points

• On August 6, 1945, during World War II, the United States dropped an atomic bomb on the city of Hiroshima, Japan.
• The bomb was known as "Little Boy", a uranium gun-type bomb that exploded with about thirteen kilotons of force.
• The bombing of Hiroshima, codenamed Operation Centerboard I, was approved by Curtis LeMay on August 4, 1945.
• The B-29 plane carried Little Boy.

Important Points

• Three days after the United States dropped an atomic bomb on Hiroshima, a second atomic bomb was dropped on Nagasaki on August 9, 1945.
• A 21-kiloton plutonium device known as "Fat Man”.
• The B-29 "Bockscar", piloted Major Charles Sweeney, was assigned to deliver the "Fat Man".

Key Points

• On 16 July 1945, U.S. scientists working on the 'Manhatten Project' successfully detonated the first-ever nuclear explosion in the ‘Trinity’ test at Alamogordo, New Mexico.

According to the given information, the pattern followed here is:

First a particular falls ILL, then visits a doctor, then consults with doctor, then takes treatment, and the last step is recovery.

So the sequence will be Illness < Doctor < Consultation < Treatment < Recovery

Hence, the correct answer is "2, 3, 1, 4, 5".

Hint

As Illness is first, no need to check all the options.

The correct answer is Paleontology.

• Paleontology is the study of the history of life on Earth as based on fossils.
• Fossils are the remains of plants, animals, fungi, bacteria, and single-celled living things that have been replaced by rock material or impressions of organisms preserved in rock.

 

Important Points

• List of some field of study:

Given:

Quotient = 76

Remainder = 536

Formula Used:

Dividend = Divisor × Quotient + Remainder

Calculation:

Let the Divisor be x

⇒ 76x+536 = 43628

⇒76x = 43628-536

⇒76x = 43092

⇒x = 43092÷76

x = 567

Given:

Speed $=\left(45 \times \dfrac{5}{18}\right)$ m/sec $=\left(\dfrac{25}{2}\right)$ m/sec

Time = 30 sec.

Formula Used:

 Distance = Speed × Time

Calculation:

Let the length of bridge be x metres.

$\dfrac{130+x}{30}=\dfrac{25}{2}$

⇒ 2(130 + x) = 750

⇒ x = 245 m.

Length of bridge will be 245 metres

The correct answer is Birbal.

• The theory of Din-i-Ilahi was introduced by Mughal Emperor Akbar.
• It is based on Monotheism, which means belief in one God.
• The first initiated disciples of Din-i-Ilahi during emperor Akbar included Birbal, Prince Salim, and Abul-Fazl ibn Mubarak.

Important Points

The correct answer is Venus.

• Almost all celestial rotation in our solar system is from West to East, or counterclockwise when looking down from the North pole.
• The two exceptions are Venus and Uranus.
• Uranus' rotational axis is tilted by slightly more than 90 degrees with respect to its orbital plane.
• Venus is the only planet in the solar system that truly exhibits reverse rotation, spinning in the opposite direction to its orbital motion.

 

Key Points

• There is no force that causes the planets to rotate.
• Most of the rotation comes about from the conservation of angular momentum.
• Angular momentum is given by L=mwr² where m is the mass, w is the angular velocity in radians per second, and r is the radius of the circular motion.
• The bottom line is that stars like the Sun spin from the original angular momentum that was there in the solar nebula from which it formed.

The logic follows here is:

Code for weekdays:

 

 

October has 31 days, Gandhiji's birthday is on 2^nd October so the number of days remaining in October is 31 - 2 = 29 days.

November has 30 days.

Christmas is on 25^th December.

Total number of days is 29 + 30 + 25 = 84 days = 12 weeks and 0 odd days

So, Sunday + 0 = Sunday.

Hence, the correct answer is "Sunday".

According to the given information:

 

The given equation will be written as,

10 ÷ 5 + 3 × 2 - 3

Now by using the BODMAS rule:

10 ÷ 5 + 3 × 2 - 3

= 2 + 3 × 2 - 3

= 2 + 6 - 3

= 8 - 3

= 5

Hence, the correct answer is "5".

The correct answer is 21st June.

• The International Day of Yoga has been celebrated annually on 21 June.
• It started in 2015.
• The International Yoga Day 2020 theme is "Yoga at Home and Yoga with Family".
• The International Yoga Day 2019 theme was "Climate Change" and it will be celebrated at United Nations on 20 June 2019 with "Yoga with Gurus" followed by a panel discussion on 21 June.

 

Important Points

• World No Tobacco Day is celebrated around the world every year on May 31.
• This year's theme is the protection of younger generations, focusing on “Protecting youth from industry manipulation and preventing them from tobacco and nicotine use”.
• In India, the National Doctors' Day is celebrated on July 1 to honor the legendary physician and the second Chief Minister of West Bengal, Dr. Bidhan Chandra Roy.
• The theme of this year's Doctors Day is "Lessen the mortality of COVID 19".
• World AIDS Day takes place on 1 December each year.
• The theme for the 2020 observance is “Ending the HIV/AIDS Epidemic: Resilience and Impact”.

Given: 

Sum of Money becomes 3 times

Rate of simple interest = 5% per annum

Formula Used;

Simple interest = (Principal × rate × time)/100

Amount =  Principal + Simple interest

Calculation:

Let the principal be Rs A

Then after tripling Amount will become 3A

Simple interest = 3A - A = 2A

2A = (A × 5 × time)/100

⇒ Time = (2A × 100)/(A × 5) = 40 years

∴ The Time period is 40 years.

Given: 

20% of boys and 30% of girls are scholarship holders

Concept:

Let number of students in the class be 5x

we know that ratio of number of boys and girls in the class: 3:2

let number of girls and boys students in the class be  2x and 3x respectively.

Calculation:

percentage of boys scholarship holder in the class :20%

number of boys scholarship holder in the class:

⇒20% of 3x = 0.6x

percentage of girls scholarship holder in the class: 30%

number of girls scholarship holder in the class:

⇒ 30% of 2x = 0.6x

Total students having scholarship = 0.6x + 0.6x = 1.2x

percentage of scholarship holder in the class:

⇒ (1.2x/5x)× 100 % = 24%

Conclusion:

percentage of students who are not scholarship holder:

⇒ 100 - 24 = 76%

The correct answer is Article - 368.

• The Constitution of India provides for its amendment to adjust itself to the changing conditions and needs.
• Article 368 in Part XX of the Constitution deals with the powers of Parliament to amend the Constitution and its procedure.

Additional Information 

• The Constitution of India talks about three types of emergencies:
• National Emergency in Article 352.
• President's Rule in State is mentioned under article 356.
• Financial Emergency in Article 360 of the Indian Constitution.
• Article 360 gives authority to the President of India to declare a financial emergency.
• Article 362 Constitution of India is Rights and privileges of Rulers of Indian States.
• Article 370 of the Indian constitution gave special status to Jammu and Kashmir, which was administered by India as a state from 1954 to 31 October 2019.

Important Points On the 5th of August 2019, Prime Minister Shri Narendra Modi Ji took a visionary decision to abrogate Article 370.

Given:

The sum of two numbers = 25

The difference of two numbers = 13

Formula Used:

 If x and y are two numbers, then

xy = [(x + y)² - (x - y)²]/4

Calculation:

Let x and y be two numbers.

According to the question,

x + y = 25 and x - y = 13

Now, xy = [(x + y)2 - (x - y)2]/4 

⇒ [(25)2 - (13)2]/4

⇒ [625 - 169]/4

⇒ 456/4

⇒ 114

∴The product of two numbers is 114.

Here, x = [(x + y) + (x - y)]/2

⇒ [25 + 13]/2

⇒ 38/2

⇒ 19

Similarly, y = [(x + y) - (x - y)]/2

⇒ [25 - 13]/2

⇒ 12/2

⇒ 6

Now, xy = 19 × 6

⇒ 114

∴The product of two numbers is 114.

Given years are century years:

1600, 1700, 1800, 1900, 2000, 2100, 2200, 2300, and 2400

Checking for leap century years (Should be divisible by 400) :

1600 ÷  400 = 4 (Divisible by 400)

1700 ÷  400 = (Not Divisible by 400)

1800 ÷  400 = (Not Divisible by 400)

1900 ÷  400 = (Not Divisible by 400)

2000 ÷  400 = 5 (Divisible by 400)

2100 ÷  400 = (Not Divisible by 400)

2200 ÷  400 = (Not Divisible by 400)

2300 ÷  400 = (Not Divisible by 400)

2400 ÷  400 = 6 (Divisible by 400)

1600, 2000, and 2400 are leap century years.

Hence, the correct answer is "3".

Important Points

A leap year is divisible by 4.

But a century leap year should be divisible by 400. 

Every century year seems to be  a leap year because it is divisible by 4 and the year 4 years back is also a leap year.

But the length of the solar year, however, is slightly less than 365¼ days-by about 11 minutes.

To compensate for this discrepancy, the leap year is omitted three times every four hundred years.

Hence, a century year is not a leap year unless it is divisible by 400.

Family chart :

Family tree :

Suresh is the brother of the girl.

Hence, the correct answer is "Brother".

The correct answer is Andhra Pradesh.

Key Points

• In 1953, the first linguistic state of Andhra for Telugu-speaking people was born.
• The government was forced to separate the Telugu speaking areas from the state of Madras, in the face of a prolonged agitation and the death of Potti Sriramulu after a 56-day hunger strike.
• Officially on November 1, 1956 Andhra Pradesh came into existence.
• In 1953, the country divided into 14 states and 6 union territories under the States Reorganisation Act that was passed in November 1956.
• The states were Andhra Pradesh, Assam, Bihar, Bombay, Jammu and Kashmir, Kerala, Madhya Pradesh, Madras, Mysore, Orissa, Punjab, Rajasthan, Uttar Pradesh and West Bengal.
• The six union territories were Andaman and Nicobar Islands, Delhi, Himachal Pradesh, Laccadive, Minicoy and Amindivi Islands, Manipur and Tripura.

The correct answer is Omprakash Rawat.

• Omprakash Rawat is a former Chief Election Commissioner of India (23 January 2018 - 1 Dec. 2018).
• He was the 22nd Chief Election Commissioner of India.
• Sunil Arora is the Current Chief Election Commissioner of India (2 Dec. 2018 - Incumbent).

Important Points

 

Additional Information

• The President appoints the Chief Election Commissioner (CEC) who has a tenure of 6 years or up to 65 years, whichever is earlier.
• Sukumar Sen was the 1st CEC of India (21 March 1950 - 19 December 1958).

The correct answer is Young Bengal Movement.

• The leader and inspirer of the Young Bengal Movement were the young Anglo-Indian Henry Vivian Derozio.
• A radical trend arose among the Bengali intellectuals during the late 1820s and the 1830s.
• This trend was more modern than Raja Ram Mohan Roy’s ideology and is known as the “Young Bengal Movement.”
• Henry Louis Vivian Derozio was an Indian poet from the 19th century.
• He was also the assistant headmaster of ‘Hindu College’ in Kolkata.
• He is the influencer of the social movement called ‘Bengal Renaissance’.

 

Important Points

• The Theosophical Society was founded by Madame Blavatsky and Col. Olcott in 1875 in New York.
• The movement was popularised by Annie Besant in India.
• ​​Asiatic Society of Bengal, the scholarly society founded on Jan. 15, 1784, by Sir William Jones.
• The objective to initiate and enlighten the oriental knowledge available in history, scriptures, or regional texts in India or the Indian subcontinent.
• Allan Octavian Hume is the father of the Indian National Congress (1829 to 1912).
• Womesh Chandra Banerjee was elected as the first president of the first meeting of the Congress.
• The Indian National Congress, on 19 December 1929, passed the historic ‘Purna Swaraj’ – (total independence) resolution – at its Lahore session.
• A public declaration was made on 26 January 1930 – a day which the Congress Party urged Indians to celebrate as ‘Independence Day’.
• Jawaharlal Nehru was elected as President of the Indian National Congress in December 1929 at its annual session in the city of Lahore.

The correct answer is Motor racing.

• Formula One also called F1 in short, is an international auto racing sport.
• F1 is the highest level of single-seat, open-wheel, and open-cockpit professional motor racing contest.

 

Additional Information

• List of Formula One drivers and their nationality:

• Some important Trophies/ Cups:

Naming the points of the given figure :

 

Triangles in the given figure are :

ΔABC, ΔBCE, ΔABE, ΔHJE, ΔCIE, ΔBIC = 6

ΔBDE, ΔBDJ, ΔDEJ, ΔBGI, ΔBGC= 5

ΔHDE, ΔDEF, ΔHDF = 3

Total triangles = 6 + 5 + 3

Total triangles = 14.

Hence, the correct answer is "14".

The correct answer is Prafulla Chaki.

Key Points

• Khudiram Bose attempted the life of Judge Kingsford with help of Prafulla Chaki.
• Khudiram was hanged on August 11, 1908, on charges of bombing the carriage of Kingsford, in the attack of which barrister Pringle Kennedy's wife and daughter were killed.
• He sacrificed his life on the altar of freedom struggle at the very young age of 18.
• The Muzaffarpur Jail, where he was executed on August 11, 1908, was renamed Khudiram Bose Memorial Central Jail.

Important Points

The correct answer is The New York Times.

• Pulitzer Prize, 2018 was awarded to The New York Times.
• The New York Times and The New Yorker have jointly won the Pulitzer Prize, in the Public Service category for the long-running Harvey Weinstein saga of sexual harassment and abuse in Hollywood.
• List of 2018 Pulitzer Prize Winners:
• Public Service: New York Times.
• Investigative Reporting: The Washington Post.
• National Reporting: New York Times and Washington Post.

Important Points

• Indian journalists namely Dar Yasin, Mukhtar Khan, and Channi Anand have been honored with the 2020 Pulitzer Prize, in the field of feature photography.
• The Pulitzer Prize is an annual award for achievements in newspaper, magazine and online journalism, literature, and musical composition in the United States.
• It was established in 1917 by provisions in the will of American-Hungarian newspaper publisher and master of yellow journalism Joseph Pulitzer.

Given time in the clock in mirror = 12 : 40.

Real time + Mirror time = 24 : 00.

Real time = 24 : 00 - Mirror image time

24 : 00 can be considered as 23 : 60 because it will simplify the subtraction process.

Real time = 23 : 60 - 12 : 40

Real time = 11: 20    (Here, decimal cycle is of 60, as 60 minutes = 1 hour).

Hence, the correct answer is  "11 : 20".

Given:

Run rate for first 10 overs =  3.2

Formula Used:

Run rate = (Total runs )/ Number of overs

Calcualtion:

for the 1st 10 overs the score will be 10*3.2=32

⇒  the remaining score is 282-32=250

⇒ remaining overs = 40

⇒  the run rate  required = 250/40=6.25

Conclusion:

∴ Run rate should be 6.25

Taking into consideration position 3 and 4 of the dice :

$ and + are two common symbols in the two positions.

Thus, the remaining two symbols * and 8 will be opposite to each other.

Hence, the correct answer is "8".

Additional Information

When two common faces are present in two positions of a dice,

The remaining two are opposite to each other.

Given:

The average of three numbers = 77

First number = 2(Second number)

Second number = 2(Third number)

Formula Used:

Average = Sum of values/Number of values

Calculation:

Let the third number be x

Second number = 2x

First number = 2 × 2x = 4x

Sum of all three numbers = x + 2x + 4x = 7x

Average = 7x/3

⇒ 77 = 7x/3

⇒ 77 × 3 = 7x

⇒ 7x = 231

⇒ x = 231/7

⇒ x = 33

Third Number = x = 33

Second Number = 2x = 2 × 33 = 66 

First Number = 4x = 4 × 33 = 132

∴ The three numbers are 132, 66, 33

The correct answer is Cryogenics.

Key Points

• Cryogenics is the production of and behavior of materials at very low temperatures.
• Ultra-cold temperatures change the chemical properties of materials, which provide an interesting area of study for researchers who wish to examine the materials as they transition from gas to liquid to a solid-state.
• The temperature of any material is the measure of the energy that it contains. Rapidly moving molecules have a higher temperature than slower-moving molecules.
• Cryogenics can be used to produce cryogenic fields for rockets, in MRI machines that use liquid helium and require cryogenic cooling, storing large quantities of food, special effects fog, recycling, freezing blood and tissue samples, and even cooling superconductors.

 

Important Points

• Cytogenetics is the branch of genetics that studies the structure of DNA within the cell nucleus.
• This DNA is condensed during cell division and form chromosomes.
• The cytogenetic studies the number and morphology of chromosomes.
• In modern times we can use advanced cytogenetics techniques such as fluorescence in situ hybridization (FISH) to look at the genetic material in the cell through a light microscope but at a much higher resolution.

The correct answer is Vector.

Key Points

• Living organisms carrying the infecting agents from one person to another (human or animal) are called Vectors.
• Vectors are frequently arthropods, such as mosquitoes, ticks, flies, fleas, and lice.
• The diseases transmitted through vectors:
• Elephantiasis is transmitted by mosquitos.
• Malaria is transmitted by mosquitos.
• Rabies is transmitted by mad dogs.

 

Additional Information

• A drone is a male honey bee.
• Unlike the female worker bee, drones do not have stingers and gather neither nectar nor pollen.
• A drone's primary role is to mate with an unfertilized queen.

Given:

Cost price of sewing machine = Rs. 800

Successive discounts = 15% and 10%

Formula Used:

Equivalent discount of two successive discount = (– A) + (– B) + AB/100

Selling Price = Marked Price × (100 – discount%)/100

Calculation:

Discount = 15% and 10%

Equivalent Discount = (– 15) + (– 10) + {(– 15) (– 10)}/100

⇒ (– 15) + (– 10) + 1.50

⇒ (– 25) + 1.50

⇒ (– 23.50)

Equivalent discount = 23.50

Selling price = 800 × (100 – 23.50)/100

⇒ 800 × (76.50)/100

⇒ 800 × 0.765

⇒ 612

Selling price = Rs. 612

∴ Selling price of sewing machine is Rs. 612

According to the given information :

B is taller than A

B > A

B is not as tall as D

D > B

C is taller than E

C > E

C is shorter than A

A > C

The correct order of their heights is :

D > B > A > C > E.

D is the tallest in the batch.

Hence, the correct answer is "D".

The correct answer is Canada.

Key Points

• BRICS is the acronym coined to associate five major emerging national economies: Brazil, Russia, India, China, and South Africa.
• BRICS Tower headquarters in Shanghai.
• The first BRIC Summit took place in 2009 in the Russian Federation and focused on issues such as reform of the global financial architecture.
• South Africa was invited to join BRIC in December 2010, after which the group adopted the acronym BRICS.
• South Africa subsequently attended the Third BRICS Summit in Sanya, China, in March 2011.

Important Points

• At the Fourth BRICS Summit in New Delhi (2012) the possibility of setting up a new Development Bank was considered to mobilize resources for infrastructure and sustainable development projects in BRICS and other emerging economies, as well as in developing countries.
• The New Development Bank (NDB), formerly referred to as the BRICS Development Bank.
• President of BRICS is Marcos Prado Troyjo.

Additional Information

• The 12th BRICS summit (21 Jul 2020 – 23 Jul 2020) was hosted by Russia.
• The 13th BRICS summit will be hosted by India in 2021.
• India hosted two summits 4th (2012) and 8th (2016).

Given:

Boat takes time to cover a certain distance upstream = 8 hours 48 minutes

Boat takes time to cover the same distance downstream = 4 hours

Formula Used:

Speed = Distance/Time

Calculation:

Let speed of boat in still water be x km/h

Let speed of current be y km/h

Let the certain distance be D km

Upstream speed = (x – y) km/h

Downstream speed = (x + y) km/h

8 hours 48 minutes = 44/5 hours

D/(x + y) = 4           .....(i)

D/(x – y) = 44/5      .....(ii)

Dividing equation (i) by (ii)

$⇒ \frac{{\frac{D}{{\left( {x + y} \right)}}}}{{\frac{D}{{\left( {x;-{\rm {y}}} \right)}}}} = ;\frac{4}{{\frac{{44}}{5}}}$

⇒ (x – y)/(x + y) = (4 × 5)/44

⇒ 44 (x – y) = 20 (x + y)

⇒ 44x – 44y = 20x + 20y

⇒ 44x – 20x = 20y + 44y

⇒ 24x = 64y

⇒ x/y = 64/24

⇒ x/y = 8/3

⇒ x : y = 8 : 3

∴ The ratio between the speed of the boat and speed of the water current is 8 : 3

The correct answer is Sushruta.

Key Points

• Sushruta is the most celebrated physician and surgeon in India.
• He is known for his work on medicine during the Gupta period
• Though he practiced during the 5th century, many of his contributions to medicine and surgery preceded similar discoveries in the Western world.
• Susrutha Samitha was written by Susrutha.
• He was said to have been the best surgeon during the Gupta period.
• Sushruta devotes a complete volume of his experiences to ophthalmologic diseases.
• The Gupta Dynasty ruled the mid-to-late 3rd century (approximately) to 543 AD. Founded by Sri Gupta.

Important Points

Gupta Dynasty:

• The founder of the Gupta dynasty was Sri Gupta.
• He was succeeded by Ghatotkacha. These two were called Maharajas.
• The next ruler was Chandragupta I and he was the first to be called Maharajadhiraja.
• Chandragupta, I was succeeded by Samudragupta in about 330 A.D., who reigned for about fifty years.
• He was a great military genius and is said to have commanded a military campaign across the Deccan, and also subdued the forest tribes of the Vindhya region.
• Samudragupta's successor Chandragupta II, also known as Vikramaditya, conquered the extensive territories of Malwa, Gujarat and Kathiawar.

Key Points

Some famous events during the rule of Gupta Kings:

• The famous Chinese pilgrim, Fahien visited India during the reign of Chandragupta II.
• Out of his nine years of stay in India, he spent six years in the Gupta empire.
• Chandragupta II waged war against the Saka satraps of western India.
• Rudrasimha III, the last ruler of the Saka satrap was defeated, dethroned, and killed. His territories in western Malwa and the Kathiawar Peninsula were annexed into the Gupta Empire.
• Kumaragupta laid the foundation of Nalanda University.

The correct answer is Fathometer.

Key Points

• A fathometer is an instrument used in measuring the depth of water by the time required for a sound wave to travel from surface to bottom and for its echo to be returned.
• The fathometer dispatches sound through a submarine oscillator and receive it through a hydrophone echo receiver.

Important Points

The correct answer is 22.

Important Points

• There are 22 bones in the skull.
• Including the bones of the middle ear, the head contains 28 bones.
• 22 bones include 8 Cranial bones and 14 Facial bones.
• Cranial bones (8):
• Occipital bone
• Parietal bones (2)
• Frontal bone
• Temporal bones (2)
• Sphenoid bone (sometimes counted as facial)
• Ethmoid bone (sometimes counted as facial)
• Facial bones (14):
• Nasal bones (2)
• Maxillae (upper jaw) (2)
• Lacrimal bone (2)
• Zygomatic bone (cheekbones) (2)
• Palatine bone (2)
• Inferior nasal concha (2)
• Vomer (1)
• Mandible (1)

Additional Information

• The axial skeleton, comprising the spine, chest, and head, contains 80 bones.
• A fully grown adult features 26 bones in the spine, whereas a child can have 34.
• There are normally 26 bones in the chest.
• Ribs contain 24bones in 12 pairs.
• The appendicular skeleton, comprising the arms and legs, including the shoulder and pelvic girdles, contains 126 bones.
• There are a total of 64 bones in the arms.
• There are a total of 60 bones in the legs.
• The pelvis (or hip bone) is made up of three regions that have fused to form two coxal bones.
• They are ilium, ischium, and pubis.

The correct answer is Narmada.

• The Sardar Sarovar Dam is built on the Narmada river in Kevadiya near Navagam, Gujarat in India.
• It is the largest dam to have been built under the 'Narmada Valley Project'.
• It has power facilities of up to 200 MW and provides relief to drought-prone areas of Kutch and Saurashtra.
• The Source of the Narmada river is Amarkantak and the mouth is the Arabian Sea, Gulf of Khambhat.
• It traverses Madhya Pradesh, Maharashtra, and Gujarat and meets the Gulf of Cambay.

Important Points

Additional Information

• Bhakra Dam - Himachal Pradesh is a gravity dam across the Sutlej River and features prominently on top of the largest dams in India.
• Its reservoir is known as the 'Gobind Sagar Lake' and is the 2nd largest in India.

Given:

Double of number + 9 = resultant

Thrice of resultant = 75

Calculation:

Let the number be x

⇒ 2x + 9 = resultant 

3(2x + 9) = 75

⇒ 6x + 27 = 75 

⇒ 6x = 75 – 27

⇒ 6x = 48

⇒ x = 48/6

⇒ x = 8

∴ The number is 8

According to the given information :

After interchanging positions,

Children in the row to the right of Moti in present position = 3 + 1 (Raju) + 7

= 4 + 7

= 11.

Moti's present position from the right = 12^th.

Hence, the correct answer is "Twelfth".

Given:

Initially water-contaminated milk in the barrel = 65 litres

Initially Ratio between milk and water = 10 : 3

Formula Used:

a : b = a/b

Calculation:

Let x litres of water is to be mixed to get the ratio between milk and water as 8 : 5

Initially milk in the solution = (10/13) × 65 litres 

⇒ 50 litres

Initially water in the solution = (3/13) × 65 litres

⇒ 15 litres

After adding x litres of water ratio between milk and water = 50/(15 + x)

⇒ 8/5 = 50/(15 + x)

⇒ 8 (15 + x) = 5 × 50

⇒ 120 + 8x = 250

⇒ 8x = 250 – 120

⇒ 8x = 130

⇒ x = 130/8 litres

⇒ x = $16\frac{1}{4}$litres

∴ $16\frac{1}{4}$ litres of water is to be mixed to get the ratio between milk and water as 8 : 5

The correct answer is Riddhi Sen.

Important Points

• Following is the list of winners of the 65^th National Film Awards’ 2018:
• Best Actor**: Riddhi Sen for ‘Nagar Kirtan’**
• Best Actress**: Sridevi for ‘Mom’**
• Best Director**: Jayaraj for ‘Bhayanakam’**
• Best Film**: Village Rockstars (Assamese)**
• Best Music Direction**: AR Rahman for 'Katru Veliyidayi'**

Additional Information

• In the 66th National Film Awards 2019, Vicky Kaushal and Ayushmann Khurrana were named Best Actors and Keerthy Suresh won the Best Actress award.

Given:

The sum of the two-digit number and the number obtained by reversing the order of its digit = 121

Difference of digits = 3

Calculation:

Let, the 10th place digit be x and the unit place digit be y where x > y

The original number be (xy) = 10x + y

x – y = 3 

⇒ x = 3 + y

Reversed number obtained by reversing the digits of the original number = yx = 10y + x

10x + y + 10y + x = 121

⇒ 10 (3 + y) + y + 10y + 3 + y =121

⇒ 30 + 10y + y + 10y + 3 + y = 121 

⇒ 22y = 121 – 33

⇒ 22y = 88

⇒ y = 88/22

⇒ y = 4 

y = 4 then x = 3 + 4 = 7 

Then the original number is 74  

We can directly answer this question by just checking the options

Difference of the digits of the two-digit number is 3 in all the options then check the sum of the two digit number and number obtained by reversing the digits

Option: 1) 85 + 58 = 143

Option: 2) 63 + 36 = 99

Option: 3) 74 + 47 = 121

Option: 4) 96 + 69 = 165

∴ The number is 74

The correct answer is Uttar Pradesh.

• Uttar Pradesh is the largest producer of sugarcane followed by Maharashtra and Tamil Nadu.
• Tamil Nadu is the 'Yarn Bowl' of India and produces 40% of the total Yarn in India.

According to the given information :

Radha is younger to Sunita

Sunita > Radha

Radha is elder than Rita

Radha > Rita

Rita is elder than Geeta

Rita > Geeta

Shyam is elder to Rita

Shyam > Rita

Shyam is younger to Radha

Radha > Shyam

The correct order of their ages is :

Sunita > Radha > Shyam > Rita > Geeta.

Geeta is the Youngest among all.

Hence, the correct answer is "Geeta".

The correct answer is a - 4, b - 2, c - 1, d - 3.

Important Points

Some Indian States and their dances:

The correct answer is Narmada.

Key Points

• River Narmada emerges from Amarkantak Hill of Maikal Range, Madhya Pradesh.
• The mouth of this river is the Gulf of Khambhat (Arabian Sea), Gujarat.
• The mighty Narmada River as well the Son, the Mahanadi, and Arnadoh which is a major tributary of the Godavari all arise in the Amarkantak plateau.
• Major dams on the Narmada river are Sardar Sarovar Dam, Indira Sagar Dam, Omkareshwar Dam, Bargi Dam, etc.

Important Points

The correct answer is Karnataka.

Key Points

• Jammu and Kashmir is the first state, which has its own flag, could fly between 1952 and 2019.
• It is a red-and-white flag with a representation of a plow and three constituent regions of the state.
  

• Karnataka has their own flag.
• In 2018, the flag was proposed by Chief Minister Siddaramaiah who unveiled it on 8 March 2018.
  

The correct answer is The Rowlatt Act.

Key Points

• The Rowlatt Act (Black Act) was passed on March 10, 1919, authorizing the government to imprison or confine, without a trial, any person associated with seditious activities.
• This led to nationwide unrest. Gandhi initiated Satyagraha to protest against the Rowlatt Act.
• Under the command of Colonel Reginald Dyer, soldiers opened fire on a large number of people gathered at Jallianwala Bagh on 13 April 1919.
• It was estimated that over 1,000 people lost their lives and another 1,500 people were injured in the firing.
• Apart from the main entrance, there was no way for the crowd to escape the garden as the area was surrounded by buildings. This is a major reason for the high number of casualties.

Important Points

• Jallianwala Bagh Massacre is also called the Massacre of Amritsar.
• Tagore was awarded the knighthood by King George v in1915, but he repudiated it in 1919 as a protest against the Amritsar (Jallianwala Bagh) Massacre.
• He is sometimes referred to as “the Bard of Bengal”.
• After this massacre, Gandhi began his first large-scale and sustained nonviolent protest (satyagraha) campaign, the Non-Cooperation Movement (1920–22).

Additional Information

• Lord Lytton passed the Vernacular Press Act in 1878.
• By this act, the magistrates of the districts were empowered, without the prior permission of the Government, to call upon a printer and publisher of any kind to enter into a Bond, undertaking not to publish anything which might “rouse” feelings of disaffection against the government.
• The Arms Act, 1959 that deals with the regulation of arms in India.
• The Act defines arms to include firearms, swords, and anti-aircraft missiles.

The correct answer is Name of Jacket.

• India’s lightest and cheapest bulletproof jacket ‘Bhabha Kavach’ was developed indigenously by Defence organizations like Ordnance Factory Board and Mishra Dhatu Nigam Limited (MIDHANI) with the transfer of carbon-nanomaterial technology from Bhabha Atomic Research Centre (BARC).
• It was displayed at the International Police Expo 2019 held at Pragati Maidan in New Delhi.
• The bulletproof jacket weighs just 6.6 kg.
• Bhabha Kavach is built from layers of high-density, high-tenacity polyethylene, which are fused at high temperatures to form a thick, hard armor plate, which is then sprayed with BARC’s carbon nanomaterial.

 

Key Points

• BARC is India’s premier nuclear research facility based in Mumbai, Maharashtra.
• BARC was founded by Homi J. Bhabha on 3 January 1954.

The correct answer is France.

• The Cannes Film Festival is an annual film festival held in Cannes, France.
• The festival had intended to make its debut in September 1939, but the outbreak of World War II forced the cancellation of the inaugural Cannes.

Additional Information

• The world’s first annual international film festival was inaugurated in Venice in 1932.
• List of some international film festivals:

The correct answer is Tropic of Cancer.

• The Tropic of Cancer passes through eight states in India: Gujarat (Jasdan), Rajasthan (Kalinjarh), Madhya Pradesh (Shajapur), Chhattisgarh (Sonhat), Jharkhand (Lohardaga), West Bengal (Krishnanagar), Tripura (Udaipur), and Mizoram (Champhai).
  

• The Tropic of Cancer is a parallel of latitude on the Earth, 23.5 degrees north of the equator.
• Mahi River is the only river in India that cuts the Tropic of Cancer twice, first in Madhya Pradesh from where it flows towards Rajasthan and enters Gujarat where it cuts for the second time.

 

Important Points

Given:

\(9 \div \left[ {8\frac{1}{5} - \left{ {1\frac{3}{4} \div \frac{3}{4} + \left( {6 - 3\frac{3}{5} + 1\frac{2}{3}} \right)} \right}} \right]\)

Concept Used:

Follow the BODMAS rule according to the table given below:

Calculation:

\(9 \div \left[ {8\frac{1}{5} - \left{ {1\frac{3}{4} \div \frac{3}{4} + \left( {6 - 3\frac{3}{5} + 1\frac{2}{3}} \right)} \right}} \right]\)

\( \Rightarrow 9 \div \left[ {\frac{{41}}{5} - \left{ {\frac{7}{4} \div ;\frac{3}{4} + \left( {6 - ;\frac{{18}}{5} + ;\frac{5}{3}} \right)} \right}} \right]\)

\( \Rightarrow 9 \div \left[ {\frac{{41}}{5} - \left{ {\frac{7}{4} \div ;\frac{3}{4} + \left( {\frac{{90; - ;54; + ;25}}{{15}}} \right)} \right}} \right]\)

\( \Rightarrow 9 \div \left[ {\frac{{41}}{5}; - \left{ {\frac{7}{4} \div ;\frac{3}{4} + ;\frac{{61}}{{15}}} \right}} \right]\)

\( \Rightarrow 9 \div \left[ {\frac{{41}}{5} - \left{ {\frac{7}{3} + ;\frac{{61}}{{15}}} \right}} \right]\)

$\Rightarrow 9 \div \left[ {\frac{{41}}{5} - ;\frac{{32}}{5}} \right]$

$\Rightarrow 9 \div ;\frac{9}{5}$

$\Rightarrow 5;$

∴ Value of \(9 \div \left[ {8\frac{1}{5} - \left{ {1\frac{3}{4} \div \frac{3}{4} + \left( {6 - 3\frac{3}{5} + 1\frac{2}{3}} \right)} \right}} \right]\) is 5

The logic follows here is :

 

Chilli grows above the ground whereas all other three grow underground.

Hence, the correct answer is "Chilli".

Sun's direction in the morning is East.

The shadow falls in the West in the morning.

Shadow is on the left of Uday means Uday's left is West.

Thus, Uday is facing to the North. 

Hence, the correct answer is "North".

The correct answer is TCS.

• TCS Becomes India's First Tech Company to Cross $100 Billion, Market Cap.
• Rajesh Gopinathan is the CEO and Managing Director of Tata Consultancy Services, a global IT firm.

Important Points

• CEO List of some companies:

Given:

8, 24, 36, 54

Concept Used:

Least common multiple(LCM): The least number which is exactly divisible by each of the given numbers is called the least common multiple of those numbers.

Calculation:

8 = 2 × 2 × 2 = 2³

24 = 2 × 2 × 2 × 3 = 2³ × 3¹

36 = 2 × 2 × 3 × 3 = 2² × 3²

54 = 2 × 3 × 3 × 3 = 2¹ × 3³

Least common multiple of 8, 24, 36, 54 = 2³ × 3³ = 8 × 27

⇒ 216

∴ LCM of 8, 24, 36, 54 is 216

The correct answer is Jonas Salk.

Key Points

• An inactivated (killed) polio vaccine (IPV) was developed by Dr. Jonas Salk and was first used in 1955.
• A live attenuated (weakened) oral polio vaccine (OPV) developed by Dr. Albert Sabin and first used in 1961.

Important Points

The correct answer is Chhotanagpur plateau.

Important Points

• The source of the Damodar river is Chota Nagpur Plateau (Palamau hills in Jharkhand) and the mouth is Hooghly River, Rupnarayan River.
• The river bifurcates into two channels at Beguahana.
• The main flow passes through the Mundeswari channel and discharges into Rupnarayan.
• The other one Amta channel carries discharge during high floods and outfalls into the Hooghly.
• There are 4 dams on the Damodar river:
• Tilaiya dam on Barakar river.
• Konar dam.
• Maithon dam.
• Panchet hill dam.

Additional Information

• The tributaries of the Hooghly river are Mayurakshi, Jalangi, Ajay, Damodar, Rupnarayan, and Haldi rivers.
• Damodar valley is home to the largest coal mines in the Jharkhand-West Bengal coal belt located in Jharia (largest coalfield of India)

The correct answer is Tamil Nadu.

Key Points

• Jallikattu is typically practiced in the Indian state of Tamil Nadu as a part of Pongal celebrations on Mattu Pongal day, which occurs annually in January.
• It involves releasing a bull into a crowd of people where participants attempt to grab its hump and ride it for as long as possible.

 

Additional Information

• Maramadi Bull Surfing race is famous in Kerala.
• Vallam Kali or traditional snake boat race famous sport in Kerala.
• Hori Habba is another rural sport practiced mainly in the Shivamogga districts of Karnataka.
• Bullock cart race in Maharashtra was a popular tradition in various parts of the state known as Bailgada Sharyat.
• Pallanguzhi is a Tamil traditional indoor board game.
• Dhopkhel is a ball game from Assam state played between two teams during the festival of Bihu.
• Camel Racing is famous in Rajasthan.

According to the given information :

A, B, C, D, E, F, G and H are sitting around a circle facing the centre.

1. F is third to the right of C and second to the left of H.

2) D is not an immediate neighbour of C or H.

3. E is to the immediate right of A who is second to the right of G.

So, we get :

Thus, B is immediate right of C. 

Hence, the correct answer is "B".

According to the given information :

A, B, C, D, E, F, G and H are sitting around a circle facing the centre.

According to the given information :

A, B, C, D, E, F, G and H are sitting around a circle facing the centre.

1. F is third to the right of C and second to the left of H.

2) D is not an immediate neighbour of C or H.

3. E is to the immediate right of A who is second to the right of G.

So, we get :

So, A is second to the left of C.

Hence, the correct answer is "A".

According to the given information :

According to the given information :

A, B, C, D, E, F, G and H are sitting around a circle facing the centre.

1. F is third to the right of C and second to the left of H.

2) D is not an immediate neighbour of C or H.

3. E is to the immediate right of A who is second to the right of G.

So, we get :

So, B is fourth to the right of H. 

Hence, the correct answer is "Fourth to the right**".**

According to the given information :

A, B, C, D, E, F, G and H are sitting around a circle facing the centre.

1. F is third to the right of C and second to the left of H.

2) D is not an immediate neighbour of C or H.

3. E is to the immediate right of A who is second to the right of G.

So, we get :

'DB' pair of persons has first person sitting to the right of the second person.

Hence, the correct answer is "DB".

According to the given information :

A, B, C, D, E, F, G and H are sitting around a circle facing the centre.

1. F is third to the right of C and second to the left of H.

2) D is not an immediate neighbour of C or H.

3. E is to the immediate right of A who is second to the right of G.

So, we get :

Thus, 'F' sits between G and D.

Hence, the correct answer is "F".

The correct answer is Amartya Sen.

Key Points

• Amartya Sen was born into a Brahman family in Santiniketan, Bengal, in India.
• In 1998, was awarded the Nobel Prize in Economics for his work in welfare economics.
• Book by Amartya Sen is Development as Freedom, The Idea of Justice, The Argumentative Indian, Garibi Aur Akaal, Identity & Violence, Inequality Reexamined, The Country of First Boys: And Other Essays, etc.

Important Points

Venn diagram according to the given information :

Travellers, Train and Bus

From Venn diagram,

As Travellers can travel in any of the two means of transport Trains or Bus.

So, we can say some travellers may travel by bus and some travellers travel by train.

So, the circle representing traveller will intersect with the other two circles which represent Trains and Bus.

Hence, the correct answer is "option (1)".

Given:

Five consecutive months sale = Rs. 6,435, Rs. 6,927, Rs. 6,855, Rs. 7,230, Rs. 6,562

Six consecutive months average sale = Rs. 6,500

Formula Used:

Average = sum of values/number of values

Calculation:

Let sale of sixth month be Rs. x

Sum of sales of six consecutive months = Rs. (6435 + 6927 + 6855 + 7230 + 6562 + x)

⇒ Rs. (34009 + x)

Number of months = 6 

Average of sales of six consecutive months = Rs. (34009 + x)/6

⇒ Rs. 6500 = Rs. (34009 + x)/6

⇒ 6 × 6500 = 34009 + x

⇒ 39000 = 34009 + x

⇒ x = (39000 – 34009) 

⇒ x = 4991

∴ Rs. 4,991 sale must he have in the sixth month so that he gets an average sale of Rs. 6,500

Given :

Rs. 700 is divided among Ram, Shyam and Jadu

Calculation:

According to Question 

Let jadu has 4X unit 

Ram : shyam : Jadu = 1 : 2 : 4

⇒ (1+2+4)X = 700

⇒ 7X = 700

⇒ X = 100

Jadu receive 4X unit = 4 × 100 = 400

∴ Jadu will share Rs. 400.

The correct answer is Kolkata to Khulna.

• A new passenger train "Bandhan Express" runs between India and Bangladesh.
• The Bandhan Express train is an international express rail service that runs between the Indian city of Kolkata (West Bengal) and the Bangladeshi city of Khulna every week.
• It was started from the first service on 9 November 2017.

Additional Information

• Maitree Express train service connecting Dhaka in Bangladesh to Kolkata in the Indian state of West Bengal in 2008.
• Two trains are originating from India to Pakistan- The Samjhauta Express and the Thar Link Express.

Logic :- Cube of each number.

Given, 125, 64, 216, 81

125 → (5)³

64 → (4)³

216 → (6)³

81 → (3)⁴

So, 81 is different other 3 numbers.

Hence, the correct answer is "81".

Given:

Each side of the Rectangle increases by 20 % 

Concept Used:

Concept of percentage. It is calculated on the basis of 100.

For example, x% means x out of 100.

Area of rectangle = Length × Breadth

Calculation:

Let, the length of the rectangle be l and the breadth be b

According to the Question,

Each side increases by 20% 

⇒ New length = (120/100) × l = (1.2 × l) and new breadth = (120/100)b = 1.2b

Initial area = l × b

new area with new side = (1.2 × l) × (1.2b) = 1.44 × lb 

$Net;change = \frac{({1.44 - 1}) \times lb}{{lb}} × 100 = 44;$

∴ The percentage in area is 44%.

Representing the given information on NESW :

So, man is finally walking in the west direction.

Hence, the correct answer is "West".

The correct answer is Sourav Ganguly.

Key Points

• A Century is Not Enough: My Roller-coaster Ride to Success (2018) is an English autobiography written by former Indian cricketer and captain Sourav Ganguly.
• Sourav Ganguly is the President of the Board of Control for Cricket in India.
• He is known as Bengal Tiger, Dada, Prince of Calcutta, The God of the Off Side, The Maharaja, The Warrior Prince.
• He is an Indian cricket administrator, commentator, and former national cricket team captain.
• Sourav Ganguly scored 131 runs on his debut at Lord’s in June 1996. Till date, it is still the highest score by any international debutant player at Lord’s.
• As a captain, Sourav Ganguly hit most centuries in a single World Cup. He hit 3 centuries in World Cup 2003.
• Sourav Ganguly plays his last test series with Australia before retirement (Border-Gavaskar Trophy played in India in 2008).
• Sourav Ganguly was the 'icon player' and captain of this team (Knight Riders) from Kolkata in the Indian Premier League.

Important Points

3rd image = 1st image + 4 dots outside.

When analyzing the assets given in the given matrix, it is seen that each row has 3 types of assets, each of which has been used once in each row.

In the last box of the each row, 4 dots on four corners of the shape are given.

Hence, the correct answer is "option (2)".

Putting options in the blank spaces :

Option 1) A C B B C A A A B B C C A A B B C C

Option 2) A A B B C C A A B B C C A A B B C C

Option 3) A B B B C A A A B C C C A B B B C C 

Option 4) A A B B C B A A B B C C A A B B C C

Option (2) is giving a pattern of aabbccaabbccaabbcc.

No other option is giving any particular pattern.

Hence, the correct answer is "acba".

The correct answer is the Unique Identification Authority of India.

Key Points

• The Unique Identification Authority of India (UIDAI) is a statutory authority established under the provisions of the Aadhaar (Targeted Delivery of Financial and Other Subsidies, Benefits and Services) Act, 2016 which is popularly known as Aadhaar Act 2016 by the Government of India, under the Ministry of Electronics and Information Technology (MeitY).
• Under the Aadhaar Act 2016, UIDAI is responsible for Aadhaar enrolment and authentication, including operation and management of all stages of the Aadhaar life cycle, developing the policy, procedure, and system for issuing Aadhaar numbers to individuals, and perform authentication and the security of identity information and authentication records of individuals.

Additional Information

• Prior to its establishment as a statutory authority, UIDAI was functioning as an attached office of the then Planning Commission (now NITI Aayog) after its establishment on 28th January 2009.
• Later, on 12 September 2015, the Government revised the Allocation of Business Rules to attach the UIDAI to the Department of Electronics & Information Technology (DeitY) of the then Ministry of Communications and Information Technology.
• UIDAI was created with the objective to issue Unique Identification numbers (UID), named as "Aadhaar", to all residents of India.
• The UID had to be
• Robust enough to eliminate duplicate and fake identities.
• Verifiable and authenticable in an easy, cost-effective way.
• The first UID number was issued on 29 September 2010 to a resident of Nandurbar, Maharashtra. The Authority has so far issued more than 124 crore Aadhaar numbers to the residents of India.