WB Police Constable (Prelims) 04 Aug 2019 Official Paper (Previous Year Paper)

The correct answer is Uganda.

• The first case of the Zika virus was officially announced in Uganda.
• Due to mosquito bites, the disease is spread through the Zika virus.

Key Points

• The Aedes mosquito is mainly responsible for the Zika virus.
• The mosquito bites during day time.
• Mild fever, rash, muscle pain, joint pain, and headache are some symptoms of the infection due to the virus.
• For 2-7 days, these symptoms persist.
• If a child is born with malfunctions, then the Zika virus can affect the child at the time of his/her birth.
• The other complications during pregnancy like preterm birth and miscarriage are also with this virus.
• Zika virus infection can also occur due to neurological complications.

Additional Information

• In 1947 in Uganda, the virus was first identified.
• In Africa and Asia, the spread of the virus was reported in 1960.

The correct answer is Akbar.

• The Mansabdari system was introduced by Akbar.
• It was introduced as a new administrative machinery and revenue system.

Key Points

• The position, state, or rank is shown by the Mansabdari system.
• The rank of Mansabdar was indicated by the Mansabdari system in the case of the Mughal administration.
• On a decimal basis, the army of Changez khan was organized.
• Babur had introduced the Mansabdari system in north India for the first time.
• The Mansabdari system was institutionalized by Akbar for the first time.
• Zat and sawar came under mansabdari system at the time of Akbar.
• The military set up and civil administration of the Mughal was reformed through this system.
• The ruling section in the imperial structure was constituted by Mansabdars.
• Mansabdars were so important that they were called the pillars of the Mughal administration.

The given series: ab___bca___ab___bc___ca

If we replace cbab in the series, we get:

abc bca bab abc bca

Clearly, this series does not form any pattern.

If we replace caca in the blanks, we get:

abc bca aab cbc aca

Clearly, this series does not for any pattern.

If we replace ccab in the series, we get:

abc bca cab abc bca

Clearly, there is a pattern in this series i.e. the first letter is being shifted to the end and remaining two letters are being shifted by one position towards their left from the previous set of three letters.

Hence, ccab will replace the blanks in the given series.

The correct answer is Lignite.

• Lignite coal is known as brown coal.
• Coal can be divided into four major ranks.

Key Points

• The highest rank of coal is anthracite.
• Anthracite is hard, brittle, and black coal.
• A high percentage of fixed carbon is found in this coal.
• Between sub-bituminous and anthracite coal, bituminous coal is found.
• For electricity generation and steel making in the US, this coal is used.
• The coal has a high heating point.
• The coal which is not shiny is sub-bituminous coal and can be classified as the third grade of coal.
• Lignite coal is also known as brown coal.
• It is the fourth grade of coal.
• The low heating value had high moisture content is the feature of this coal.

Given:

The ratio of three numbers = 1 : 2 : 3

HCF = 12

Concept used:

Two number is written as mx and my, where m is HCF.

Calculation:

Let the number be x, 2x, and 3x

HCF =x

According to the question, x = 12

Largest number = 3x

⇒ 3 × 12

⇒ 36

∴ The largest number is 36.

The correct answer is Sharatchandra Chattopadhyay.

• Sharat Chandra Chattopadhyay was known by the name of Anila Devi.
• He is also known as Sharat Chandra Chatterjee.

Key Points

• In the 20th century, he was a Bengali novelist.
• He also wrote many short stories.
• The lifestyle, tragedy, and struggle of village people and the contemporary social practices that prevailed in Bengal were showcased in his stories.
• He was born in the Hoogly district of Bengal in 1876.
• He was an adventure-loving boy.
• During school time, he was a very bright student.
• Most of his childhood was spent in Bhagalpur in Bihar by him.
• The famous book Devdas was written by him.
• Srikanta, Devdas, Parineeta, and Pother Dabi are some of his notable works.

Given:

The speed of the motorcycle is 20 km/hr and 30 km/hr.

Formula used:

Average speed = (Total distance travelled)/(Total time is taken)

Calculation:

Let the distance between A to B be x km.

Time is taken from travel A to B = x/20 hr

Time is taken from travel B to A = x/30 hr

Total distance = 2x

Average speed = (Total distance travelled)/(Total time is taken)

⇒ Average speed = 2x/(x/20 + x/30)

⇒ Average speed = 120x/5x

⇒ Average speed = 24 km/hr

∴ The average speed of the motorcycle is 24 km/hr.

Sum of all the angles of the triangle = 180° 

So, we get:

3x + (2x - 7) + (4x - 11) = 180° 

⇒ 9x = 180 + 18 

∴ x = 22

As the mirror is placed to the right of the image, the image will be rotated by 180 degrees on its vertical axis. In the image, the closed triangle is to the right of the open triangle which has a semicircle in it. In the reflection, the closed triangle will be to the left of the open triangle.

Hence, the above image will be the reflection of the image given in the question.

The correct answer is Dadabhai Naoroji.

• Dadabhai Naoroji was the first to determine national income.
• He is also known as the grand old man of India.

Key Points

• He was also an unofficial ambassador of India.
• In the UK, he was a member of the house of Commons in 1892.
• He was the first Indian to become a member of the British parliament.
• He was born in Bombay.
• He was the co-founder of the Indian National Congress.
• He was an academician, politician, and trader.
• He propounded the theory of wealth drain from India.
• He was born in a Parsi family.
• Maharaja of Baroda, Sayajirao Gayakwad patronised him.
• The London society in 1865 was launched by him.

The correct answer is 109

• 1 gigabyte is equal to 1000000000 bytes.
• A data measurement unit is known as the byte.

Key Points

• A byte contains 8 bits.
• 256 different values are represented by a single byte.
• To store a single character, the byte was originally created.
• To represent all uppercase and lowercase letters, 256 values are required.
• Few bytes of data may be contained by the small plain text.
• To measure specific data within the file, a byte is used.
• 1024 bytes is contained by the 1 kilobyte.

Molecules are made up of two or more atoms. Similarly, Tissues are made up of two or more cells.

(90/100)A = (30/100)B

⇒ A = B/3

⇒ B = 3A

⇒ (2x/100) × A = 3A

∴ x = 150

Given:

Sum of digits of the number = 8

Digits of the number exchanges places when 18 is subtracted from the number.

Concept used:

A two digit number xy can be written as 10x + y and after reversing the digits it will become 10y + x.

Calculations:

Let the number be xy, where x and y are the digits at tens place and unit place respectively.

x + y = 8      ----(i)

The number can be written as 10x + y.

So, After reversing the digits number will become 10y + x.

(10x + y) - 18 = 10y + x

⇒ 10x - x + y - 10y = 18

⇒ 9x - 9y = 18

⇒ 9(x - y) = 18

⇒ x - y = 2      ----(ii)

On adding equation (i) and (ii),

x + y + x - y = 8 + 2

⇒ 2x = 10

⇒ x = 5

Putting the value of x in equation (i),

5 + y = 8

⇒ y = 8 - 5

⇒ y = 3

∴ The number is 53.

Shortcut Trick

 Checking through options:

Considering option 1:

35 - 18 = 17 ≠ 53; Not same as the exchanged digits.

Considering option 2:

62 - 18 = 44 ≠ 26; Not same as the exchanged digits.

Considering option 3:

44 - 18 = 26 ≠ 44; Not same as the exchanged digits.

Considering option 4:

53 - 18 = 35 = 35; Same as the exchanged digits.

∴ The number is 53.

Let the numbers be x, (x + 1), (x + 2), (x + 3), (x + 4), (x + 5), (x + 6)

⇒ x + x + 1 + x + 2 + x + 3 + x + 4 + x + 5 + x + 6 = 20 × 7 = 140

⇒ 7x + (1 + 2 + 3 + 4 + 5 + 6) = 140

⇒ 7x + 21 = 140

⇒ 7x = 119

⇒ x = 119/7 = 17

∴ The largest number = x + 6 = 17 + 6 = 23

The correct answer is a severe storm is coming.

• The different atmospheric pressure values are indicated by a barometer.
• 30.20 hg value of barometer is considered is high.

Key Points

• A clear sky and calm weather are associated with high pressure.
• If the reading of a barometer falls rapidly, it means a severe storm is coming.
• The continued fair weather is represented by rising or steady weather.
• The fair weather is represented by the slowly falling pressure.
• Cloudy and warmer conditions are represented by normally falling pressure.
• The metric unit millibar is used by weather researchers.
• Isobars are used to connect lines of equal atmospheric pressure.
• The changes in the atmosphere are reflected by using isobars.

Given:

Width of the street = 10 meter

Dimensions of rectangular garden = 100 m × 80 m

Formula used:

Area of rectangle = Length × Breadth

Area of street = Area of larger rectangle (Including path) – Area of smaller rectangle (Only garden)

Calculations:

Length of smaller rectangle (Only garden) = 100 m

Breadth of smaller rectangle (Only garden) = 80 m

Length of larger rectangle (Including path) = 100 + 10 + 10 = 120 m

Breadth of larger rectangle (Including path) = 80 + 10 + 10 = 100 m

Area of street = (120 × 100) – (100 × 80)

⇒ 12000 – 8000

⇒ 4000 m2

∴ The area of the path is 4000 m2.

Shortcut Trick

Area of street = 2w(l + b + 2w)

Where ‘w’ is the width of path and ‘b’ is the width of rectangular garden, ‘l’ is the length of rectangular garden.

So,

Area of path = 2 × 10 × (100 + 80 + 2 × 10)

⇒ 20 × 200

⇒ 4000 m2

∴ The area of the path is 4000 m2.

The correct answer is water formed with isotopes of hydrogen.

• The water that contains a heavy form of hydrogen which is known as deuterium is called heavy water.

Key Points

• Most of the hydrogen in normal water is made by the common hydrogen isotope.
• The water with a heavier hydrogen isotope has different chemical properties.
• Deuterium contains protons and neutrons.
• As compared to the protium atom, the deuterium atom is very heavy.
• Each hydrogen atom is heavier in heavy water.
• Deuterium oxide is the scientific name of heavy water.

The correct answer is Uttar Pradesh.

• An imaginary line is called as tropic of cancer.
• The tropic of cancer does not pass-through Uttar Pradesh.

Key Points

• It makes an angle of 23.50 degrees.
• At the north of the equator, there is the tropic of cancer.
• It passes through the middle of the country.
• Through 17 countries, the tropic of cancer passes.
• In India, the tropic of cancer passes through the 8 states.
• The states are- Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura, and Mizoram.
• Through Mahi River, the River crosses twice.

Key Points

• The Tropic of Capricorn is located below the equator.
• Subtropics is on the north of the tropic.
• The North temperate zone has also located north of the tropic.

Given:

Total distance travelled = 61 km

Time taken to cover 61 km = 9 hours

Speed on foot = 4 km/h

Speed by cycle = 9 km/h

Formula used:

Speed = Distance/Time

Calculations:

Let the distance covered on foot be x km.

So, distance covered on cycle = (61 - x) km.

Total time = Time taken by foot + Time taken by cycle

9 = (x/4) + (y/9)

⇒ 9 = (x/4) + {(61 - x)/9}

⇒ 9 = (9x + 244 - 4x)/36

⇒ 9 = (5x + 244)/36

⇒ 324 = 5x + 244

⇒ 5x = 80

⇒ x = 16 km

∴ He covered 16 km on foot.

Given:

Speed of boat in downstream = 12 km/hr

Speed of boat in upstream = 8 km/hr

Total distance = 24 km

Concept used:

Speed of boat in upstream = u – v

Speed of boat in downstream = u + v

Where,

u = speed of boat in stationary water

v = speed of river

Formula used:

Speed = Distance/Time

Calculations:

u + v = 12      ----(i)

u - v = 8      ----(ii)

On adding equation (i) and (ii),

(u + v) + (u - v) = 12 + 8

⇒ 2u = 20

⇒ u = 10 km/hr

Time = Distance/speed

⇒ 24/10

⇒ 2.4 hours

∴ It will take 2.4 hours to cover a distance of 24 km in stationary water.

Except for A, all others are consonants. A is a vowel.

Hence, A is different from the other options.

The correct answer is the general election.

• In the ballot voting system, VVPAT (voter-verified paper audit trail) is used to provide feedback to voters.
• It is like an independent verification system.

Key Points

• The voters verify their casted votes correctly by using it.
• It is done to detect any malfunction.
• For stored election results, it is like an audit.
• The name of the candidate and symbol of the party are contained in the VVPAT.
• It is different from the paper.
• The human eye can read a paper VVPA.
• A direct-recording electronic system is included in the VVPAT.
• It assures that their votes have been recorded as intended.
• The legal ballot consists of a paper audit trail.
• VVPAT was introduced in India in the 2014 general election.

The correct answer is ​Iron and Vitamin C.

• Iron and vitamin C are not found in a good amount in milk.
• The top food source for calcium is milk.

Key Points

• The top source of calcium, potassium, and vitamin D is milk.
• Vitamin c content of a maximum of 0.35 mg/dL is found in full-fat milk.
• 1% of milk fat is found in skimmed milk.
• Phosphorous, vitamin A, B12, riboflavin are found in milk.
• A naturally good source of milk is cow’s milk.
• Cow’s milk does not contain a sufficient amount of vitamin C.

The correct answer is Global System for Mobile.

• GSM technology is used in mobile phones.
• The full form of GSM is Global System for Mobile.

Key Points

• ETSI (European Telecommunication Standard Institute) has developed this technology.
• The protocols for second-generation digital cellular networks are described by the GSM technology.
• In 1991, Finland was the first country of deploying GSM.
• The global system of mobile communication became a global standard for mobile communications in 2010.
• It achieved a market share of 90% at that time.
• A digital circuit-switched network that was optimized for full-duplex voice telephony was described by GSM global technology.
• The GSM associations own the trademark of GSM.
• It is a secured wireless system.
• A pre-shared key is used for user authentication.
• Several cryptographic algorithms for security are used in GSM technology.

If we convert 53 days into weeks, we get:

53/7 = 7 weeks 4 days

If today is Tuesday then the first day of the seventh week will be Wednesday. It further implies, the last day of the seventh week would be Tuesday. 

The next four days will be Wednesday, Thursday, Friday, and Saturday.

Hence, the 53rd day after today is Saturday.

Given:

HCF = 6

Product of two numbers = 2160

Concept used:

If 'a' and 'b' are two numbers, then LCM × HCF = a × b

Calculations:

Let the first number be 'a' and second number be 'b'.

LCM × HCF = a × b

⇒ LCM × 6 = 2160

⇒ LCM = 360

HCF : LCM = 6 : 360

⇒ 1 : 60

∴ The ratio between the H.C.F. and L.C.M. of those two numbers is 1 : 60.

The given figure:

The triangles are: ABC, ECG, DBF, HFJ, IGJ, JDE, ICD, HEB, AGH, AIF

Hence, there are 10 triangles in the image.

K is the sister of F who is the brother of A. J is the brother of C who is the daughter of A.

Clearly, F is the Uncle of J.

The correct answer is Cricket.

• Smriti Mandhana is an Indian cricketer.
• She plays for the **Indian women’**s national team.

Key Points

• She is named the best women international cricketer in 2018 by BCCI.
• She was also awarded the Racheal hey hoe flint award for the best female cricketer of the year by ICC in 2018.
• ICC also named her the ODI player of the year in 2018.
• Her full name is Smiriti Srinivas Mandhana.
• She was born in Mumbai, Maharashtra.

Important Points

• In one day game in 2013, she became the first Indian woman to achieve the double hundred.
• She scored three half-centuries for India in the 2016 women’s challenger trophy.
• With Brisbane heat in 2016, she was signed with one year deal for WBBl.
• She was also signed for Kia super league in 2018.

Additional Information

Some notable Indian sports personalities in Table Tennis, Hockey, and Boxing:

Table Tennis:

1. Manika Batra (2018 Commonwealth Games gold medalist, first Indian woman to win a singles medal at the Asian Games)
2. Achanta Sharath Kamal (2010 Commonwealth Games gold medalist, multiple-time national champion)
3. G. Sathiyan (2018 Asian Games bronze medalist, ranked in the top 25 in the world)
4. Mouma Das (2010 Commonwealth Games gold medalist, multiple-time national champion)
5. Sutirtha Mukherjee (2014 Commonwealth Games bronze medalist, multiple-time national champion)

Hockey:

1. Manpreet Singh (current captain of the Indian national team, Olympic bronze medalist)
2. P.R. Sreejesh (goalkeeper for the Indian national team, Olympic bronze medalist)
3. Rani Rampal (captain of the Indian national team, Asian Games gold medalist)
4. Vandana Katariya (forward for the Indian national team, Olympic bronze medalist)
5. Savita Punia (goalkeeper for the Indian national team, Olympic bronze medalist)

Boxing:

1. Vijender Singh (2008 Olympic bronze medalist, 2010 Asian Games gold medalist)
2. Amit Panghal (2019 World Championships silver medalist, 2018 Asian Games gold medalist)
3. Lovlina Borgohain (2020 Olympic bronze medalist, 2022 World Championships bronze medalist)
4. Mary Kom (six-time World Champion, Olympic bronze medalist)
   
5. Nikhat Zareen (2022 World Championships gold medalist, 2022 Commonwealth Games gold medalist)
6. Manju Rani (2022 World Championships bronze medalist, 2022 Asian Championships silver medalist)
   

The correct answer is Karnataka.

• Bandipur Sanctuary is located in Karnataka.
• As a tiger reserve, it was established in 1974.

Key Points

• The sanctuary was established under the project tiger.
• It is also a national park.
• In Karnataka, the second highest tiger population can be found.
• Nagarhole national park is adjacent to the Bandipur national park.
• For Maharaja of the kingdom of Mysore, it was at a time a private hunting reserve.
• Now it has been updated to a tiger reserve.
• The sanctuary is known for the wildlife sanctuary and many types of biomes,
• A large number of dry deciduous forests can be found here.
• The Ministry of Environment and Forest and Karnataka forest department is the governing body for the sanctuary.
• Bandipur is located in the Chamarajanagar district of Karnataka,
• Here the Deccan plateau meets the Western Ghat.

Given:

Amount = 2 × Principal

Rate = 18.75% per annum 

Formula used:

(i) SI = PRT/100

(ii) A = SI + P

Where, A = Amount

SI = simple interest

P = principal

R = rate

T = time

Calculations:

SI = (P × R × T)/100

⇒ SI = (P × 18.75 × T)/100

⇒ SI = 3PT/16

A = SI + P

⇒ 2P = (3PT/16) + P

⇒ 2 = (3T/16) + 1

⇒ 1 = 3T/16

⇒ T = 16/3 years

⇒ T = 5 years 4 months

∴ In 5 years 4 months the amount will be doubled at a rate of 18.75% simple interest per year.

Let the present age of the father be F and the present age of the son be S.

According to the question:

F + S = 100 years    ((i) equation)

Also, 

$F - 5/ S - 5 = 2/1$

⇒ 2S - F = 5 years   ((ii) equation)

On solving these two equations, we get

S = 35 years

F = 65 years

The ages of the father and the son after 10 years would be 75 years and 45 years respectively.

Given:

The selling price of 4 articles is equal to the cost price of 5 articles.

Concept used:

SP = CP × (100 + P)%

SP → selling price  CP → cost price  P → profit

Calculation:

Let the profit obtained by selling one article be P.

Let the cost price and selling price of each article be CP and SP respectively.

The selling price of 4 articles = 4 × SP

Cost price of 5 articles = 5 × CP

4SP = 5CP

Or, SP/CP = 5/4

P = SP - CP = 5 - 4

Profit percentage = P/CP × 100 = 1/4 × 100 = 25%

∴ Profit percentage is 25%.

Given:

A's investment = Rs 7000

Ratio of profit of A and B = 2 ∶ 3 

Months for which B deposited = 9 months

Concept used:

Ratio of profit = Rati of (time × investment)

Calculation:

Let the investment of B be Rs x.

Time of investment of A = 1 year = 12 months

Ratio of  (time × investment) of A and B = (7000 × 12) ∶ (x × 9)

(7000 × 12)/(x × 9) = 2 ∶ 3

⇒ 7000 × 12 × 3 = x × 9 × 2

Or, x = Rs 14,000

∴ B's investment is Rs 14,000.

The correct answer is Toluene.

• Toluene is used to make saccharine.
• Saccharine is an artificial sweetener.

Key Points

• No food energy is present in it.
• As compared to sucrose, it is 300-400 times sweet.
• The aftertaste of saccharine is bitter or metallic.
• To sweeten the products like drinks, candies, cookies, and medicines it is used.
• It gives stability with heat.
• With other food articles, it does not react.
• To compensate for other sweetener's weaknesses, saccharine is blend with other sweeteners.
• Saccharin is not water-soluble in its acid form.

Important Points

• For acid form, sodium salt is used as an artificial sweetener.
• Calcium salt can be used occasionally.
• Bladder cancer can be developed due to the high intake of saccharines.
• It has no nutritional value.

The correct answer is Weak teeth.

• Fluorine deficiency causes weak teeth or tooth decay.
• Fluorine is also called Fluoride.

Key Points

• The deficiency of this causes the breakdown of dental tissues.
• Osteoporosis can also be caused due to fluorine deficiency.
• A bone disorder that leads to a decrease in bone mass is called osteoporosis.
• An increase in bone fragility takes place.
• It is not an essential nutrient.
• To prevent tooth decay, it is a must require.
• Information about teeth is also incorporated.
• Lack of fluoride in the diet or poor oral hygiene is the common cause of tooth decay.

The correct answer is Winter.

• Our body needs more fat in winter season.
• For weight loss, summer can be said as the best season.

Key Points

• During summer, the average intake of calories is about 200 calories per day.
• The Winter season is also called a seasonal affective disorder.
• The brighter season is summer.
• The season which helps us to remain active in summer.
• Our instinct to maintain body fat is stronger in winter as compared to other seasons.

Calculation:

7/11, 16/20, 21/22

LCM of denominators = LCM(11, 20, 22) = 220

7/11 → (7 × 20)/220

16/20 → (16 × 11)/220

21/22 → (21 × 10)/220

Numerator → 140, 176, 210

The decreasing order is = 210/220, 176/220, and 140/220

The decreasing order of the given fractions is 21/22, 16/20, 7/11.

A turns right after walking in the south direction for 2 km and walks another 5 km. Then she turns left and walks 3 km and then again takes a left turn and walks another 5 km.

A is standing in the South direction with respect to her original position.

Hence, the answer is South.

The correct answer is ​Yangtze.

• Yangtze is the largest River in Asia.
• It is also known as the Chang Jiang River.

Key Points

• In China and Asia, it is the longest River.
• In the world, it is the third-longest River.
• On the plateau of Tibet, its source is found.
• The River flows through the East China Sea.
• The length of the River is approx. 6300 km.
• It is longer than the Mississippi River.
• For China, the River is historically, culturally, and economically very important.
• In the Yangtze basin, more than one-third of China’s population lives.
• The principal navigable way of China passes through this River.
• About more than the 200-million-kilowatt power is produced by this River.

The correct answer is Energy. 

• A kilowatt-hour (kWh) is a unit of energy. It represents the amount of energy consumed or produced when a device with a power rating of one kilowatt (1,000 watts) operates continuously for one hour. In SI units, one kilowatt-hour equals 3.6 million joules (3.6 megajoules) of energy.

Concept:

Power: The rate of work done by the electric energy is called power. It is denoted by P.

• The SI unit of power is the watt (W).
• Watt is a small unit that's why a kilowatt-hour is used as the unit for electrical energy.

1 unit of electric energy: When a one-kilowatt load works for 1 hour then the energy consumed is called 1 unit of electricity.

• 1 Unit of electricity = 1 kWh = 1000 Watt-hour = 3.6 × 106 J
• 1 Kilo-watt = 1000 Watt

1 Watt: The energy consumption rate of 1 joule per second is called 1 watt.

• The capacity to do work or power consumed in a given time is called energy.
• Power is the rate of doing work or the rate at which energy is spent.
• Kilowatt-hour is the unit of energy.

Key Points

• One thousand-watt makes one kilowatt.
• 1 kw hour is equal to 3600 kilojoules.
• For billing units of energy delivered to consumers by electric appliances, this unit is used.
• It is a non-SI metric unit system.
• The one kilowatt of hour sustained for one hour is the composite unit of energy.
• In kilowatt-hours, the electrical energy is typically sold to consumers.
• In terawatt hours, the major energy production or consumption is expressed.
• How much energy is used by us is measured by Kilowatt-hour.

Mistake Points

Energy is the total amount of work done, and power is how fast you can do it. In other words, power is energy per unit of time. Power is watts. Energy is watt-hours.

The correct answer is Silver Bromide.

• Silver Bromide is used in developing a photo from a photographic film.
• Gelatin emulsion consists of photographic paper and film.

Key Points

• In paper or film base, silver halide grains are layered up.
• Chlorine, bromine, and iodine are used in making halides.
• Bromine is the most common.
• In traditional film photography, chlorine chemistry is most often used.
• Chlorine is used in the form of silver chloride.
• Photographic film is the sheet of transparent film.
• Gelatin emulsion is coated in its one side.
• Microscopic light-sensitive silver halide crystal is contained by the photographic film.
• The sensitivity, contrast, and resolution of the film are decided by the sizes and characteristics of the crystals.
• There is one layer of silver halide crystal in the black and white photographic film.

The correct answer is Tokyo.

• The summer Olympic 2020 beheld in Tokyo.
• It is scheduled to be held in July in Tokyo, Japan.

Key Points

• In March 2020, it was scheduled to take place, but due to the Covid-19 pandemic, it could not happen.
• The Olympic game has been postponed and rescheduled for the first time in history.
• There will be 206 nations that will participate as expected.
• During the 125th IOC session in Argentina, Tokyo was selected as the host city.
• Tokyo had hosted the first summer Olympic game in 1924.
• The introduction of new competitions like freestyle BMX, madison cycling will be seen in this Olympic.
• Madrid, Tokyo, and Istanbul are three candidate cities.
• Originally the Japanese Prime minister has headed the Tokyo organizing committee.
• A fund has been set aside by Tokyo metropolitan committee.

The correct answer is 100th.

• Through the 100th amendment of the Indian constitution, the exchange of territories had occurred between India and Bangladesh.
• Pasha enclaves are the enclaves of India and Bangladesh.

Key Points

• During India-Bangladesh borders these enclaves were held.
• In Tripura, Assam, and Meghalaya, and in Bangladesh these enclaves fall.
• The land boundary agreement was signed between the Prime minister of India and Bangladesh in 1974.
• To exchange enclaves and simplifying their international border was the objective of signing this agreement.
• In 2015, a revised version of the agreement was adopted by India and Bangladesh.
• There was a modification in the number of enclaves held by these two countries in the agreement.
• Dahagram-Angarpota is the only enclave that is the exclave of Bangladesh.
• Between Indira Gandhi and Sheikh Mujibur Rehman, the land boundary agreement was signed in 1974.

Given:

The selling price of an article is = Rs. 616

Profit obtained = 12%

New SP of the article = Rs 462

Concept used:

Selling price = Cost price × (100 + P)%

Selling price = Cost price - loss

Calculation:

616 = Cost price × (100 + 12)/100

616 × 100/112 = Rs 550 = cost price

Loss = Cost price - Sellinf price

Loss = 550 - 462 = Rs 88.

∴ The will be a loss of Rs 88 if the article is sold at Rs 462.

Mirror is required for the reflection to happen, similarly, water is required for refraction to happen.

The correct answer is black.

• The colour of the sky is black that an astronaut will see in space.
• Because of the scattering of light particles, the sky appears blue when viewed from the earth.

Key Points

• But when there is an atmosphere, blue light gets refracted.
• The actual colour of the sky is black.
• And there is no atmosphere in the space.
• So the astronauts see the black colour of the sky.
• There is no scattered light to reach our eyes in outer space.
• A range of wavelengths of light is emitted by the sky.
• All the wavelength of light can’t be seen by us.

The correct answer is the Bardoli movement.

• During Bardoli satyagraha, Sardar Vallabhbhai Patel was given the title of Sardar.
• The Bardoli movement was held in 1928 in Bardoli Gujarat.

Important Points

• The movement was a major part of the civil disobedience movement.
• Vallabhbhai Patel had led the movement.
• Patel became one of the main leaders of the independent movement through Bardoli Satyagraha.
• The tax rate was raised by 22 percent by the government of the Bombay presidency in 1925.
• Many petitions were filed from the civic groups.
• There was a refusal to cancel the increased tax rate by the authorities even in the situation of calamities.
• The farmers had not enough property and not even enough crops to pay off the tax.
• So the situation of the farmers became worst.
• The movement was laid by farmers in the leadership of Sardar Patel.

The correct answer is Karnam Malleswari.

• Karnam Malleshwari was the first Indian woman to win an Olympic medal.
• In the past, many Indian women had participated in the Olympics.

Key Points

• From India, in Olympics 7 women have won the medal.
• Karnam won a bronze medal in Sydney Olympics.
• She won the medal in the women’s 69 kg category in weightlifting.
• Women boxing was featured for the first time as a sport in the 2012 London Olympics.
• Mary Kom was the only Indian to qualify for the event in the 2012 London Olympics.
• In the semi-final, Nicola of the UK defeated Mary Kom.
• In Olympics, the first medal in Badminton was won by Saina Nehwal.
• In wrestling in London Olympics, the first Indian woman was Geeta Phogat to qualify.

Given:

The area of square = area of the rectangle

The perimeter of square = S

The perimeter of rectangle = R

Concept used:

Area of square = a², a → side of the square

The perimeter of square = 4a

Area of rectangle = l × b , l → length, b → breadth

The perimeter of rectangle = 2 × (l + b)

Calculation:

a² = l × b

S = 4a

R = 2 × (l + b)

Let us put values and check,

a = 4, l = 8 and b = 2

16 = 8 × 2

LHS = RHS

Then, S = 4 × 4 = 16

R = 2 × (l + b) = 2 ×  (8 + 2) = 20

From this, we can say that, S < R.

For any value of a. l and b, for the given condition, S < R always.

Shortcut Trick

The area of square = area of the rectangle

Let the side of a square be 6 units and,

The sides of a rectangle be 9 units and 4 units

Now area of square = area of the rectangle.

Perimeter of a square (S) = 4(6) = 24

Perimeter of a rectangle (R) = 2(9 + 4) = 26

⇒ 24(S) < 26(R)

∴ option 3 is correct option.

The correct answer is due to Refraction & Dispersion of light.

• Rainbow is a meteorological phenomenon.
• The phenomena occur due to total internal reflection, refraction and dispersion of light.

Key PointsConcept:

Dispersion:

• The splitting of light into its component colours is called dispersion.

Reflection:

• Reflection of Light is the process of sending back the light rays which fall on the surface of an object.

Refraction:

• bending of the light beam as it travels from one medium to another is known as the refraction of light.

It takes place at the boundary between the two mediums.

Explanation:

• The rainbow formation is due to the Dispersion & Refraction of light.
• The different processes involved in rainbow formation are shown-

• The ray is first refracted at the air-droplet interface and dispersed into 7 colours.
• The dispersed rays are then totally internally reflected by the droplet-air interface.
• The dispersed rays then undergo refraction at the droplet-air interface and finally rainbow is formed.
• In this, we can see that refraction and total internal reflection plays an important role in rainbow formation but as we know splitting of white light into seven colours is caused because of a phenomenon known as dispersion

Hence the spread in colour in a rainbow in the sky is primarily due to the Dispersion of sunlight

Given:

The length of the diagonal of the rectangle is 10 cm. And if it is double of a side of that rectangle

Concept Used:

Area = Length × Breadth

Diagonal² = Length² + Breadth²

Calculation:

Length of the diagonal = 10 cm

Accordingly,

Length of one side of the rectangle = 10/2 = 5 cm

Let, length of another side be x

10² = 5² + x²

⇒ x² = 100 - 25

⇒ x = √75

⇒ x = 5√3

Area of the rectangle = 5 × 5√3 = 25√3

∴ The area of the rectangle is 25√3 cm².

1. S and Z are sitting on the two middle seats.
   

2. A and P are sitting on the two extreme seats.
   

3. R is sitting to the immediate left of A.
   

It is only possible if A is sitting on the rightmost end. It further implies that P is sitting on the leftmost end and X is sitting to his immediate right as it is the only seat left now.

Hence, X is sitting to the immediate right of P.

Given:

Two pipes A and B can fill the tank in 12 minutes and 16 minutes respectively. 

The tank will be fill in 9 minutes.

Concept Used:

Capacity of the tank = LCM of time taken by two pipes individually

Calculation:

Capacity of the tank = LCM of 12 and 16 = 48 units

Efficiency of pipe A = 48/12 = 4

Efficiency of pipe B = 48/16 = 3

Tank will be filled in 9 minutes and the whole time pipe A was opened

In 9 minutes tank filled by pipe A = 9 × 4 = 36

⇒ Tank filled by pipe B is (48 - 36) = 12 unit

Pipe B was opened for 12/3 = 4 minutes

∴ After 4 minutes pipe B should be closed.

Two pipes A and B together can fill the tank in 12 minutes and 16 minutes respectively. In 9 minutes tank become full.

In 1 minute pipe A can fill 1/12 part of the tank

⇒ In 9 minutes tank is filled by pipe A = 9/12 = 3/4 part

In 1 min pipe B can fill 1/16 part of the tank

Let, after x minutes pipe B was closed

⇒ In x minutes tank is filled by pipe B = x/16 part

Accordingly,

3/4 + x/16 = 1

⇒ x/16 = 1 - 3/4

⇒ x/16 = 1/4

⇒ x = 4

∴ After 4 minutes pipe B should be closed.

The logic is;

Hence, E would come in place of the question mark.

The given equation: 12 + 6 ÷ 3 - 2 x 8 = ?

+ → ÷

÷ → -

- → ×

× → +

On replacing the mathematical signs according to the data given in the question, we get:

12 ÷ 6 - 3 x 2 + 8 = ?

2 - 6 + 8 = ?

10 - 6 = 4

Hence, 4 is the answer.

Given:

The price of kite and spool together is 1 rupee 10 paise, and the price of the spool is more than the price of the kite by Re.1

Concept Used:

Concept of linear equation of one variable

Rs.1 = 100 paise

Calculation:

1 rupee 10 paise = 110 paise

Let, the price of the kite is x paise

⇒ Price of the spool is (x paise + Rs.1)

⇒ (x + 100) paise

Accordingly,

x + (x + 100) = 110

⇒ 2x = 110 - 100

⇒ 2x = 10

⇒ x = 5

∴ The price of the kite is 5 paise.

A tennis lover can be both a student and a cricketer.

A student can be both a tennis lover and a cricketer.

A cricketer can be both a tennis lover and a student.

Hence, the above Venn diagram best represents the relationship among the three.

In the first image:

(6 x 5) ÷ 2 = 15

In the second image:

(6 x 7) ÷ 6 = 7

Similarly, in the third image:

(4 x 8) ÷ 4 = 8

Hence, 8 will come in place of the question mark.

The given series: Z Q S T L R M N Q N R T U V X R L T A L T Q L T

Hence, there is only one such L which is preceded by R and followed by T.

The correct answer is Delhi - New Delhi.

• Delhi and Noida are considered the twin cities.
• Kolkata and Howrah are considered twin cities.

Key Points

• On the west bank of the Hoogly River Kolkata is situated.
• Durgapur and Asansol are also known as the twin cities.
• Hyderabad and Secundrabad are known as the twin cities.
• The capital of Telangana is Hyderabad.
• Cuttack and Bhubaneswar in Odisha are also known as twin cities.
• Pune and Pimpri-Chinchwad in Maharashtra are also known as the twin cities.
• Hubli and Dharwad in Karnataka are also known as twin cities.
• Durg and Bhilai in Chattisgarh are also known as twin cities.

The correct answer is Asbestos.

• Firefighting clothes are made up of Asbestos.
• A naturally occurring fibrous silicate substance is asbestos.

Key Points

• There are six types of asbestos.
• Long and thin fibrous crystal is contained in asbestos.
• Many microscopic fibrils are found in each fibre crystal.
• Asbestos is a carcinogen substance.
• A carcinogen substance is that, which causes cancer.
• Lung cancer and mesothelioma are caused by all types of asbestos.

Important Points

• Asbestos is heat resistant.
• Fireproofing and chemical resistance is provided by asbestos.
• In naturally occurring deposit around the world, asbestos is found.

The correct answer is Gopal Krishna Gokhale.

• Gopal Krishna Gokhale founded the ‘Servants of India society.
• It was formed in Pune, Maharashtra in 1905.

Key Points

• The Deccan education society was left by Gokhale to form this association.
• This association was formed with a small group of educated Indians.
• To promote social and human development and overthrow the British rule in India was the objective of forming this association.
• Many campaigns for education, sanitation, and healthcare were promoted by the organization.
• Untouchability, discrimination, alcoholism, poverty, and oppression of women like issues were raised.
• Hitavada was the magazine, which was published through the association.
• The political activities were not done through it.
• Shri P.k Dwivedi managed the affairs of society in Uttarakhand.

The correct answer is Earth.

• Earth is known as a blue planet.
• We live on earth.

Key Points

• From the sun, it is the third planet.
• Life existed only on this planet.
• Around 4.5 billion years ago, the earth was formed.
• Inside the solar system, the earth is a rocky planet.
• Earth moves around the sun due to the large mass of the sun.
• In space, the earth also turns around.
• At different times, a different part of the earth is faced by the sun.
• A large amount of liquid water is found only on the earth.
• Water covers around 74 percent area of the earth.
• From different places, the earth water came.
• Of all the rocky planets, the earth is the largest.
• As compared to Jupiter, it is very small.

12 + 6 ÷ 3 - 2 x 8

Q →  +

J →  x

T →  -

K →  ÷

The given equation:

30 K 2 Q 3 J 6 T 5 = ?

On replacing the letters with mathematical operators, we get:

30 ÷ 2 + 3 x 6 - 5 = ?

15 + 18 - 5 = ?

33 - 5 = 28

Hence, 28 is the answer.

Given:

 $\sqrt{2^n}$ = 64

Concept Used:

If a^m = aⁿ, then m = n

Calculation:

 $\sqrt{2^n}$ = 64

⇒ 2^n/2 = 2⁶

⇒ n/2 = 6

⇒ n = 12

∴ The value of n is 12.

The logic is as follows;

Similarly, Thursday is coded as;

Hence, HTVSTYAD is the code for the word THURSDAY.

The correct answer is Fish.

• Fish contains a large amount of protein.

Key Points

• Fish is a low-fat high-quality protein.
• It is filled with omega-3 fatty acids and some vitamins such as D and B2 (riboflavin).
• It is rich in calcium and phosphorus and a great source of minerals, such as iron, zinc, iodine, magnesium, and potassium.

Important Points

• Proteins are essential nutrients for the human body.
• They are one of the building blocks of body tissue and can also serve as a fuel source.
• As a fuel, It provides as much energy density as carbohydrates.

​

Additional Information

• Benefits of Eating fish:- 
• Fish is packed with protein, vitamins, and nutrients that can lower blood pressure.
• High in important nutrients.
• May lower our risk of heart attacks and strokes.
• Contain nutrients that are crucial during development.
• May boost brain health.
• May help prevent and treat depression.
• May reduce our risk of autoimmune diseases.
• May help prevent asthma in children.

The correct answer is Lord William Bentinck.

• Lord William Bentick abolished the practice of Sati.
• The Bengal Sati regulation abolished the Sati.

Key Points

• Sati was made illegal by this regulation.
• A Hindu practice Sati was prevalent in ancient India.
• In the deceased husband pyre, the act of sacrificing the lives of women is called Sati.
• The extent of Sati is not known clearly.
• In the elite Hindu Rajput clan in western India, Sati was prevalent during Mughal times.
• Initially, the East India company have tolerated the practice of Sati.
• The reason for tolerance was the extension of the East India Company all over India.
• In the late 20th century, isolated incidents of Sati were reported in India.
• Sati prevention act1987 criminalized the practice of Sati.
• Sati existed in India before the Gupta empire.

Vina is older than Savita but she is younger than Priya.

Priya > Vina > Savita    (i)

Rinki is younger than Priya and Vina

Priya > Vina > Rinki      (ii)

On combining (i) and (ii), we can easily say that Priya is the eldest person.

The correct answer is ​Animal.

• The sponge is an animal.
• Sponge belongs to the family of phylum Porifera.

Key Points

• The sponge is a multicellular organism.
• There are many pores in their bodies.
• The water circulates through these pores.
• Spongiology is the branch of zoology, in which sponges are studied.
• An unspecialized cell is a sponge.
• In different types, sponges can be transformed.
• The nervous, digestive or circulatory system is not present in the sponges.
• They make a sister group of all other animals.
• The shape of mesohyls is taken by the sponge.
• Choanocytes cell covers the inner surface of the sponge.

The correct answer is Aurangzeb.

• Mughal emperor Aurangzeb is also known as ‘Zinda Pir’.
• His original name was Muhi-ud-din-muhammad.

Key Points

• He was also known by the title of Alamgir.
• In the Mughal emperor hierarchy, he was sixth.
• The entire Indian subcontinent was almost ruled by him.
• In the Mughal empire, he was the last effective ruler.
• The sharia law and Islamic economy were fully established by him.
• In Indian history, he was considered the most controversial ruler due to his policies.
• Bahadur shah 1 had succeeded him.
• He believed in the expansionist policy.
• Qing China was surpassed by India during his rule.
• The entire Quran was memorized by him.

The correct answer is ​Theatre.

• Girish Karnad is related to Theatre.
• He was an actor, director, and Kannada writer.

Key Points

• In south Indian cinema, he worked.
• He also worked with Bollywood.
• In 1960, he rose as a playwright.
• In Kannada, modern Indian playwriting started in 1960.
• In 1998, he was awarded the Jnanpith award.
• He was born in Bombay.
• Tughalak and Taledanda are some of his notable works.
• The play was composed by him for four decades.
• The play of Girish Karnad was translated into English by himself.
• He was also a screenwriter and actor in Indian and Kannada cinema.
• Padma Shree and Padma Bhusan was given to him by the government of India.
• Four Filmfare awards were won by him.

Given:

Length of two trains are 137 m and 163 m

Speed of the trains are 42 km/hr and 48 km/hr respectively

Concept Used:

If two moving objects are moving towards each other, then their relative speed should be the sum of their individual speed

Distance = Time × Speed

Calculation:

To cross each other total distance should be cover by the trains is (137 + 163) = 300 m

Relative speed of trains = (42 + 48) = 90 km/hr

⇒ 90 × (5/18) m/sec          [∵ 1km/hr = 1000m/3600sec = 5/18 m/sec]

⇒ 25 m/sec

Total time to cross each other = 300/25 seconds

⇒ 12 seconds

∴ They will take 12 seconds to cross each others.

The correct answer is January 3.

• The earth is closest to the sun on January 3.
• The point that is nearest to the sun is called perihelion.

Key Points

• The point that is farthest to the sun is called aphelion.
• Approx. an elliptical orbit is occupied by all planets, asteroids, and comets in our solar system.
• The flatness of the orbit is measured by the orbital eccentricity.
• On January 3, the earth comes closest to the sun every year.
• In the northern hemisphere, it is winter, when the earth is closest to the sun.
• At that time it is summer in the southern hemisphere.
• Aphelion occurs on July 4.

The correct answer is Boxing.

• The term jab is related to boxing.
• A type of punch is called jab.

Key Points

• It is used in martial arts.
• Jab is of many types.
• In 1825, the term jab was first used.
• To thrust with a point is the meaning of the jab.
• A fighter’s defence is done with the help of a jab.
• When moving backwards, a defensive jab can be applied.
• High mobility is provided by a jab to a fighter.
• To score points it is used generally.
• To preserve the mobility and balance of their stance, many types of jab are used by fighters.
• To establish a feeling for distance, the jab is used.
• To set up a power punch with another hand, the range-finding jab is used.

Given:

Price of two types tea is Rs. 15 and Rs. 20 per kg

Price of the mixture tea is Rs. 16.50 per kg

Concept Used:

Concept of Alligation 

Calculation:

        1st type tea                                          2nd type tea

               15                                                        20

                                          16.50

       (20 - 16.50) = 3.50                                  (16.50 - 15) = 1.50

Ratio of 1st type tea : 2nd type tea = 3.50 : 1.50

⇒ Ratio of 1st type tea : 2nd type tea = 35 : 15 = 7 : 3

∴ Required ratio between two types tea will be 7 : 3.

5% of √(2x) = 0.01

⇒ (5/100) × √(2x) = 0.01

⇒ 0.05 × √(2x) = 0.01

⇒ √(2x) = 0.01/0.05

⇒ √(2x) = 0.2

Taking square on both sides,

⇒ 2x = (0.2)²

⇒ 2x = 0.04

∴ x = 0.04/2 = 0.02

Given:

Given numbers = 3, 5, 7 and 9

Respective remainders = 1, 3, 5 and 7

Concept used:

The number divisible by 3, 5, 7, and 9 will be its LCM or its multiples.

Calculation:

LCM of  3, 5, 7, and 9 = 5 × 7 × 9 = 315

Largest 4 digit number divisible by 315 = 9999 - Remainder of (9999/315) = 9999 - 234

Largest 4 digit number divisible by 315 =  9765

But, here, we need to find the number which will leave respective remainders = 1, 3, 5 and 7

Not that, (divisor - remainder) in all the cases is = (3 - 1) = (5 - 3) = (7 - 5) = (9 - 7) = 2

So, to get the required number that will leave the above-said remainders, we need to subtract 2 from 9765.

Required number = 9765 - 2 = 9763.

Calculation:

Let the number be x

According to the question,

35% × x = 91

⇒ 35/100 × x = 91

⇒ x = 260

∴ The number is 260.

The correct answer is Raazi.

• Film Raazi has been considered the best film in film fare 2019.
• The Times group presented the 64th Filmfare awards.

Key Points

• The best Indian Hindi language films are honored by it.
• On 23rd March 2019, in Mumbai, Maharashtra the ceremony was held.
• The film Raazi also bagged the critic's award for best film.
• Most awards were given to the films Andhadhum and Raazi.
• Most nominations were made to the film Padmaavat.
• 5 awards were won by Andhadhun and Raazi each.
• The Best Actor award was given to Ayushman Khurana.
• The best actress award was given to Alia Bhatt.
• There was a tie for the award of best-supporting actor.
• This happened for the first time in Filmfare awards.

Given:

Rs.680 is divided among A, B and C

A gets 2/3 of what B gets, and B gets 1/4 of what C gets

Calculation:

Let their respective shares be A, B, and C, respectively.

According to the question,

A + B + C = 680      ----(i)

A = (2/3) × B = (2/3)B      ----(ii)

B = C/4      

⇒ C = 4B      ----(iii)

On substituting the values of equations (ii) and (iii) into equation (i), we get:

(2/3)B + B + 4B = 680

⇒ (17/3)B = 680

⇒ B = 120

∴ The share of B is Rs.120

We know that:

40² = 1600,

41² = 1681,

and

42² = 1764.

∴ The smallest number to be added to 1728 to make it a perfect square = 1764 – 1728 = 36

The correct answer is ​Bimal Jalan.

Key Points

• Bimal Jalan is a former Governor of Reserve Bank of India and was a nominated member of the Upper House of India's Parliament, the Rajya Sabha during 2003–2009.
• He wrote the book The Future of India.
• The Book The Future of India Politics, related to  Economics and Governance was first published on June 01, 2006.
• Emerging India, India: Priorities for the Future are the other important book written by Vimal Jalan.

Given:

The ratio of the present age of X and Y is 3 ∶ 4

The ratio of their age 5 years ago was 5 ∶ 7

Calculation:

From the given conditions we get:

X/Y = 3/4

⇒ X = 0.75Y      ----(i)

Also, (X – 5)/(Y – 5) = 5/7

⇒ 7 × (0.75Y – 5) = 5 × (Y – 5)

⇒ 5.25Y – 35 = 5Y – 25

⇒ 0.25Y = 10

⇒ Y = 40

∴ The present age of Y is 40 years

The correct answer is Lord Pethick Lawrence.

• The chief position in cabinet mission 1946 was held by Lord Pethick Lawrence.
• To discuss the transfer of power from the British government to Indian leadership was the aim of the coming of cabinet mission to India.

Key Points

• To preserve India’s unity and grant the most awaited independence to India was also the aim of the mission.
• The cabinet mission came to India in 1946.
• At that time, Lord Wavell was the viceroy of India.
• Many proposals were included in the mission.
• But it was rejected by INC.
• Jinnah demanded Pakistan demanded six full provinces.
• A complicated system with three tiers for India was proposed by the mission.
• To foreign affairs, defense, currency, and communication, the center power was confined.
• All the other powers were kept with provinces.

The correct answer is Article 32.

• Article 32 is described as the heart and soul of the constitution by B.R.Ambedkar.
• Article 32 deals with the right to constitutional remedies.

Key Points

• The right to move to the Supreme court is affirmed by this article.
• The appropriate proceedings are required for the realization of this article.
• The rights are mentioned in part 3 of the constitution.
• To issue a direction, orders or writs are the power of the Supreme court.
• The habeas corpus, quo warranto, prohibition, and certiorari are the types of writs that can be issued by the Supreme court of India.
• Suspension of the rights provided by this article could not happen unless the suspension is provided by the constitution itself.
• In violation of fundamental rights, any person can move to court by using this article.

The correct answer is ​Akbar.

• Fatehpur Sikri was established by Akbar.
• It is located in the Agra district of Uttar Pradesh.

Key Points

• Akbar founded the Fatehpur Sikri as the capital city of the Mughal empire.
• Sikri is a village in Uttar Pradesh.
• At this place, the khangas existed earlier.
• In sikri, Jahangir was born.
• In 1573, after Akbar’s victorious Gujarat campaign, it was called the city of victory.
• In 1803, an administrative center was established by the English here.
• From the painted grey ware period, there was a settlement here.
• In 1571, this city was founded.
• On the modal of Timurid forms and styles, its architecture is based.
• Red sandstone is used in its construction.

AB = 25

A → 2

B → 5

BC = 57

C → 7

BD = 58

D → 8

CADB = 7285

Hence, 7285 is the code for CADB.

The correct answer is ​South Africa.

• The President of South Africa was the chief guest at the celebration of the Indian Republic day in 2019.
• His name is Cyrill Ramaphosa.

Key Points

• Prime Minister Modi had invited him to the sidelines of the G20 summit in Argentina.
• He was also South Africa’s one of the bigger business executives.
• He was a member of the African national congress revolutionary vanguard.
• 58 tribal guests from various parts of the country had participated in the republic day celebration in 2019.
• All women Assam Rifles also performed in the event showcasing women empowerment.
• The veterans of Subhas Bose INA also participated in the Republic day parade.

The given equation is:

[1 - (1/3)] × [1 - (1/4)] × [1 - (1/5)]...[1 - (1/99)] × [1 - (1/100)]

= (2/3) × (3/4) × (4/5) × (5/6)..........(98/99) × (99/100)

= 2/100 = 1/50

∴ [1 - (1/3)] [1 - (1/4)] [1 - (1/5)]...[1 - (1/99)] [1 - (1/100)] = 1/50

The correct answer is Pomology.

• The study of fruits is called pomology.
• The branch also studies the cultivation of fruits.
• It is the branch of botany.

Key Points

• The development, enhancement, and cultivation of fruit trees are focused on pomology.
• Fruit tree improvement is the main focus area of this branch.
• Fruit quality, regulation of production period, and reduction of production cost are also considered in the studies.
• Pomologist is involved in the science of pomology.
• An important area of research is provided by pomology.
• The fruit is matured and ripened ovary.
• Charles Dowing is considered the father of pomology.
• He was an American pomologist.

Important Points

• Anthology: An anthology is a collection of literary works chosen by the compiler, it may be a collection of plays, poems, short stories, songs, Etc.
• Spermology: The study of the seeds is known as spermology.
• It involves the study in terms of morphology, features, and also interaction with the environment.
• Petrology: Petrology is the study of rocks such as igneous, metamorphic, and sedimentary and the processes that form and transform them.
• Mineralogy is the study of the chemistry, crystal structure, and physical properties of the mineral constituents of rocks.

The correct answer is ​Pinaki Chandra Ghosh.

• Pinaki Chandra Ghosh is appointed as the first Lokpal of India.
• An anti-corruption authority is Lokpal.

Key Points

• He can be also referred to as the body of the ombudsman.
• He works in the public interest in the republic of Idia.
• On the allegation of corruption against public functionaries, he has the authority to inquire.
• In 2013, the Lokpal and Lokayukta act was passed.
• Anna Hazare led the Jan Lokpal movement in 2011.
• The corruption charges at the national level are enquired by the Lokpal.
• The corruption charges at the state level are required by the Lokayukta.
• The age of the Lokpal should not be less than 45 years.

The correct answer is liver.

• After skin, the largest organ in the human body is the liver.
• The organs in the human body are classified as the longest based on the length and weight of the body organ

• The skin is the largest organ of the human body, But in the official paper it was not present as an option therefore, here the liver will be considered the right option as the ''liver is the largest solid internal body organ''

Key Points

• 75-80 organs normally compose the human body.
• All the organs together form an organ system.
• To keep us alive, all these organs work in a smooth way.
• A self-contained group of tissues forms the organ.
• Millions of tissues and billions of cells are contained in an organ.
• All these tissues and cells work together to carry out the particular function.
• The external largest organ of the human body is the skin.
• The whole body is covered by the skin.
• The largest, internal and complicated organ in humans is the liver.

The correct answer is 1919.

• Jallianwala Bagh incident took place in 1919.
• It is also known as the Amritsar massacre.
• In the crowd of unarmed Indian civilians, the British Indian army fired on the order of Reginald Dyer.

Key Points

• Almost 379 people were killed in that incident.
• 12000 people were injured.
• All the meetings were banned on that day by Dyer.
• But the information of this banning was not circulated properly among the masses.
• To celebrate the festival of Baisakhi, villagers gathered in the Bagh.
• There was a peaceful protest due to the arrest of two national leaders, Saffudin kitchlew and Satyapal.
• In the garden, the dyers entered with his troop and fired.
• The main gate was also closed.
• The hunter committee was established to enquire about this incident.

The correct answer is Boat Race.

• Nehru Trophy is associated with Boat Race.

• Nehru Cup is associated with football.
• Nehru Trophy is associated with Boat Race.
• Jawaharlal Nehru Hockey Tournament is associated with hockey, which is organized by the Jawaharlal Nehru Hockey Tournament Society (JNHTS).

Key Points

• Boat-race is a famous sport in Kerala.
• The boats are usually snake-shaped.
• These snake boats or 'chundanvallam' are up to 100 feet long.
• There are many important races that occur during these events and we have listed below some of the most famous boat races that happen in Kerala.
• One of them is Nehru Trophy Boat Race.

The given series: 3, 7, 13, 21, 31, ?

The logic is,

7 - 3 = 4

13 - 7 = 6

21 - 13 = 8

31 - 21 = 10

Following the same pattern:

? - 31 = 12

⇒ ? = 43

Hence, 43 will be the next term in the series.

The correct answer is Mahatma Gandhi.

• The Kaiser-e-Hind title was given to Mahatma Gandhi.
• The title was given by the emperor of India for public service during 1900-1947.

Key Points

• GW Leitner has coined this term.
• Queen Vie was awarded this title in 1915.
• Queen Victoria has instituted this medal.
• The title means emperor of India.
• Three grades were contained in the medal.
• The Kaiser-e-hind gold medal was given on the recommendation of the secretary of state of India.
• It was awarded directly by the monarch.
• Viceroy awarded the silver and bronze medal.
• Gandhi was its most famous recipient.
• Lord Harding awarded this title to Gandhi in pursuit of ambulance service in South Africa.

The correct answer is Distance covered.

• An odometer is used to measure the distance travelled.
• To measure the distance travelled by a vehicle, an odometer is used.

Key Points

• In ancient roman works, the first evidence of an odometer can be found.
• How far the vehicle has travelled is shown by the odometer.
• In-vehicle dashboard, the odometer is situated.
• From two Greek words path and measure, the word odometer is derived.
• An ammeter is used to measure electric energy.
• The speed of an aeroplane is measured using an airspeed indicator and it is measured in 'knots' or nautical miles per hour.