The correct answer is P. Susheela.

Key Points

• Legendary playback singer of South Indian languages, P Susheela, celebrated for her versatility, has entered the Guinness World Records for recording the highest number of songs in several languages in a career spanning over half a century.
• Pulapaka Susheela Mohan (born in1935) has reportedly recorded up to 17,695 solo, duet, and chorus-backed songs in over six Indian languages since the 1960s.
• She has sung songs in Tamil, Telugu, Malayalam, Kannada, Hindi, and other Indian languages.

Additional Information

• Guinness Book of World Record:
• ​It is a reference book published annually, listing world records of both human achievements and the extremes of the natural world.
• The brainchild of Sir Hugh Beaver, the book was co-founded by twin brothers Norris and Ross McWhirter in Fleet Street, London, in August 1954.
• The book itself holds a world record, as the best-selling copyrighted book of all time.
• As of the 2019 edition, it is now in its 64th year of publication, published in 100 countries and 23 languages, and maintains over 53,000 records in its database.

The correct answer is Human culture.

Key Points

• The word “science” is derived from the Latin word Scientia meaning knowledge.
• Science refers to a systematic and organized body of knowledge in any area of inquiry that is acquired using “the scientific method”
• Science can be grouped into two broad categories:
• Natural science: Natural science is the science of naturally occurring objects or phenomena, such as light, objects, matter, earth, celestial bodies, or the human body.
• Natural sciences can be further classified into physical sciences, earth sciences, life sciences, and others.
• Physical sciences consist of disciplines such as physics (the science of physical objects), chemistry (the science of matter), and astronomy (the science of celestial objects).
• Earth sciences consist of disciplines such as geology (the science of the earth).
• Life sciences include disciplines such as biology (the science of human bodies) and botany (the science of plants).
• Social science: social science is the science of people or collections of people, such as groups, firms, societies, or economies, and their individual or collective behaviors.
• Social sciences can be classified into disciplines such as psychology (the science of human behaviors), sociology (the science of social groups), and economics (the science of firms, markets, and economies).

From Statement I: A man is 3^rd from the beginning of the queue.

Cannot determine the number of people in the queue.

From Statement II: A man is 20^th from the center of the queue.

Cannot determine the number of people in the queue.

From Statement III: A man is 7^th from the end and 17th from the beginning.

From only statement III, we can find the total number of people in the queue:

A man is 7th from the end so there are 6 persons after the man + 17^th from the beginning so there are 16 persons before the man + the man himself = 6 + 16 + 1 = 23

so, there are 23 people in the queue.

Hence, **‘**Only statement III is sufficient’ is the correct answer.

The correct answer is Mixer and grinders.

Key Points

• ​Chlorofluorocarbons (CFCs) are nontoxic, nonflammable chemicals containing atoms of carbon, chlorine, and fluorine.
• They are used in the manufacture of aerosol sprays, Refrigerators, blowing agents for foams and packing materials, as solvents, and as refrigerants.

Additional Information

• Chlorofluorocarbons (CFCs) contribute to ozone depletion in the upper atmosphere, the manufacture of such compounds has been phased out under the Montreal Protocol, and they are being replaced with other products such as hydrofluorocarbons (HFCs) including R-410a and R-134a.
• The production of CFCs ceased after 1995.
• The interim replacements for CFCs are hydrochlorofluorocarbons (HCFCs), which deplete stratospheric ozone, but to a much lesser extent than CFCs.
• Ultimately, hydrofluorocarbons (HFCs) will replace HCFCs.
• Unlike CFCs and HCFCs, HFCs have an ozone depletion potential (ODP) of 0.

Here the logic is:

Illiterate : Educated → Antonym of Illiterate is Educated

Similarly,

Flood : ?  → Antonym of flood is Drought

Hence, ‘Flood : Drought’ is the correct answer.

The correct answer is Bhutan.

• Archery is the national sport of Bhutan.
• It was declared as the national sport in 1971, the inclination of people towards archery in Bhutan started in the 1920s, under the leadership of Jigme Wangchuk, the second king of the country.

Key Points

• Bhutan: 
• ​It is bordered by the Tibet Autonomous Region of China in the north, the Chumbi Valley of Tibet, and is barely separated from Nepal, from the Indian state of Sikkim in the west and the Indian states of Assam, West Bengal, and Arunachal Pradesh in the south, east, and southwest.
• Thimphu also spelled Thimbu is the capital of Bhutan.
• Lotay Tshering is the current Prime Minister of Bhutan.
• The Ngultrum is the currency of Bhutan.

Additional Information

The Correct Answer is the Shared Culture.

Key Points

• Ethnic' group of people, more appropriately, refers to people with a Shared culture.
• Ethnic Group, a social group of the population that, in a larger society, is set apart and bound together by common ties of race, language, nationality, or culture.
• In the United States of America, the term “ethnic” carries a different meaning from how it is commonly used in some other countries, due to the historical and ongoing significance of racial distinctions that categorize together what might otherwise have been viewed as ethnic groups.
• Ethnicity in the U.S. therefore usually refers to collectives of related groups, having more to do with physical appearance, specifically skin color, rather than political boundaries.​

The Correct Answer is Rational numbers do not include fractions.

• Every fraction is a rational number, but the rational number does not have to be a fraction.
• Let a/b be a fraction, a and b are natural numbers.
• Since each natural number is an integer. So, a and b are all integers.
• Thus, the fraction a/b is a quotient of two integers such that b is a quotient of 0.
• Therefore, a/b is a rational number.
• A fraction is expressed in the form of the ratio of whole numbers: a/b and b≠0.

Important Points

• Irrational numbers are all real numbers that are not rational numbers. In other words, irrational numbers can not be expressed as the ratio of two integers.
• Real numbers are special, up to order-preserving isomorphism, a complete ordered field containing rational numbers as an ordered sub-field.

The correct answer is Application Software.

Key Points

• MS Word is an example of application software developed by the company Microsoft.
• It allows users to type and save documents.
• It is helpful too for making documents.
• It is originally developed by Charles Simonyi and Richard Brodie, it was first released in 1983.
• It is available for Microsoft Windows and Apple OS.

Additional Information

Compiler:

• It is computer software that translates source code written in a high-level language (e.g. C++) into a set of machine language instructions that can be understood by a digital computer's CPU.
• Compilers are very large programs, with error checking and other abilities.

Operating System (OS):

• It is software that acts as an interface between the end-user and computer hardware.
• Every computer must have at least one OS to run other programs.
• OS helps to communicate with the computer without knowing how to speak the computer's language.

System Software:

• It refers to the files and programs that make up the computer's operating system.
• Examples of System Software include operating systems like Mac OS, GNU/Linux, Android, and Microsoft Windows.

Concept Used:

√a > √b only when a > b,  where a and b are whole number

Calculation:

3√5 = √45, 2√8 = √32, 4√6 = √96

⇒ √96 > √45 > √32

⇒ 4√6 > 3√5 > 2√8

Symbol representation:

Important Points

• The question is asked about U.
• So, to determine the answer, we need to know the gender of U.
• However, the gender of U cannot be determined.

The family tree diagram is shown below:

Hence, ‘Cannot be determined ’ is the correct answer.

The correct answer is Vatican City.

Key Points

• St. Peter's Square is located in Vatican City.
• St Peter Square is also known as "Piazza San Pietro".
• St. Peter's Square is a large plaza located directly in front of the St. Peter's Basilica in the Vatican City, the papal enclave inside Rome, directly west of the neighbourhood of Borgo.
• It is named after Saint Peter, an apostle of Jesus considered by Catholics to be the first Pope.
• In the centre of the square is an Ancient Egyptian obelisk, erected at the current site in 1586.
• Gian Lorenzo Bernini designed the square almost 100 years later, including the massive Doric Colonnades, four columns deep, which embrace visitors in the "maternal arms of mother church".
• It also represents the core of the Vatican City, the smallest state in the World.
• In the origins, the square used to be the place where Nerone Circus and Gardens were located, and where many Christians including Saint Peter, suffered from martyrdom.

Additional Information

The correct answer is Foreign Direct Investment.

Key Points

• FDI Stands for Foreign Direct Investment.
• It is an investment made by a firm or individual in one country into business interests located in another country.
• However, FID's are distinguished from portfolio investments in which an investor merely purchases equities of foreign-based companies.
• It plays an important role in the economic development of a country.
• There are 3 types of FDI:
• Horizontal FDI
• Vertical FDI
• Conglomerate FDI
• Horizontal FDI: 
• It is where funds are invested abroad in the same industry.
• In other words, a business invests in a foreign firm that produces similar goods.
• For example, a US-based firm may purchase Puma, a Germany-based firm.
• They are both in the industry of sportswear and therefore would be classified as a form of horizontal FDI.
• Vertical FDI:-
• Vertical FDI is where an investment is made within the supply chain, but not directly in the same industry.
• In other words, a business invests in a foreign firm that it may supply or sell too. For example, Hershey's, a US Manufacturer may look to invest in cocoa products in Brazil.
• This is known as backward vertical integration because the firm is purchasing a supplier, or potential supplier, in the supply chain.
• Conglomerate FDI:
• It is where an investment is made in a completely different industry. In other words, it is not linked in any direct way to the investor's business.
• For Example, Walmart, a US retailer, may invest in BMW, a German automobile manufacturer.

Important Points

• Advantages of FDI:
• Boost to International Trade.
• Reduced Regional and Global Tensions
• Sharing of Technology, Knowledge, and Culture.
• Diversification
• Lower Costs and increased efficiencies
• Tax Incentives
• Employment and Economic Boost
• Disadvantages of FDI:
• Foreign Control
• Loss of Domestic Jobs
• Risk of Political or Economic Change

The correct answer is United for Peace and Harmony.

Key Points

• The Head of State and Government of the Non-Aligned Movement (NAM), gathered in the Island of Margarita, Bolivarian Republic of Venezuela, within the framework of the XVII Conference Summit, on 17-18 September 2016, with the slogan United for Peace and Harmony.
• Between 2014 and 2020, two NAM Summits were held in 2016 and 2019.
• 2016 in Venezuela and 2019 in Azerbaijan.
• In both Summits, India was represented by Vice President.
• Nicolas Maduro is the Chairperson of NAM.
• India is one of the founding members of the NAM Summit and India hosted the 7^th NAM Summit in 1983 in New Delhi.

Additional Information

• NAM:
• The Non Aligned movement is a forum of 120 developing world states that are not formally aligned with or against  any major power.
• After the United Nations, it is the largest grouping of states worldwide.
• Members: 120 States
• Establishment: Belgrade, SFR Yugoslavia September 1,1961

The statement mentions that all drugs have side effects, so no medicine without the risk of side effects is true. Still, no information is given about the drugs that make things worse than the disease itself, so the only conclusion I follow. Hence, ‘Only conclusion I follow’ is the correct answer.

The Correct Answer is 17/25.

• Decimal termination is generally defined as a decimal number that comprises a finite number of digits after the decimal point.
• Terminating decimals like 13.2 can be interpreted as repeated decimals 13.20000000000 ... so where the repeating digit is zero, the number is usually labelled as terminating.
• Both ending decimals are rational numbers that can be written down as reduced fractions with denominators having no prime number variables other than two or five.
• 17/25 = 0.68
• 1/6 = 0.16666666666
• 10/3 = 3.3333333333
• 1/11 = 0.0909090909
• Option (2) have two-digit after decimal means this fraction has finite number while other have infinite numbers after decimal.

The correct answer is The constituents of a mixture retain their properties.

Key Points

• Mixture:
• A Mixture is a combination of two or more substances in any proportions.
• There are two types of Mixture:
• Homogeneous mixture
• Heterogeneous mixture
• Properties of Mixture:- 
• The Mixture has no fixed composition.
• To form mixture energy is neither produced nor evolved.
• The Mixture has no fixed melting and boiling point.
• Mixture retains the properties of its components.
• Components of Mixture can be separated by simple physical methods.

Here the logic is:

The word is coded as:

Similarly,

FRUIT can be coded as:

Hence, ‘IUTRF’ is the correct answer.

Here the logic is:

In this type we solve the question according to ‘BODMAS’ rule :

To balance the equation i.e. (RHS = LHS) we check each option one by one:

1. = × ÷ +  → 25 = 5 × 35 ÷ 20 + 2 → 25 ≠ 5 × 35 ÷ 20 + 2 Hence, RHS is not equal to LHS

2. • = × ÷  → 25 + 5 = 35 × 20 ÷ 2 → 30 ≠ 350 Hence, RHS is not equal to LHS

3. ÷ + = ×  → 25 ÷ 5 + 35 = 20 × 2 → 40 = 40 Hence, RHS is equal to LHS

4. × ÷ + =  → 25 × 5 ÷ 35 + 20 = 2 → 25 × 1 ÷ 7 + 20 ≠ 2 Hence, RHS is not equal to LHS

Hence, ’÷ + = × ’ is the correct answer.

The correct answer is Svetlana Alexievich.

Key Points

• Svetlana Alexievich is a Belarusian investigative journalist, essayist, and oral historian who writes in Russian.
• She was awarded the 2015 Nobel Prize in Literature "for her polyphonic writings, a monument of suffering and courage in our time."
• She was the first writer from Belarus to receive the award.
• She was elected chairman of the Belarusian PEN Center on 26 October 2019.
• During the 2020 Belarusian protests, Alexievich became a member of the Sviatlana Tsikhanouskaya Coordination Council.

Important Points

Calculation:

given expression is 1 ÷ [{p²/(p + 6)} + {6p/(p + 6)}]

⇒ 1 ÷ [{p² + 6p}/(p + 6)]

⇒ 1 ÷ [{p(p + 6)}/(p + 6)]

⇒ 1/p

Follow BODMAS rule to solve this question, as per the order given below.

Step -  1: Parts of an equation enclosed in 'Brackets' must be solved first, and following BODMAS rule in the bracket -

Step -  2: Any mathematical 'Of' or 'Exponent' must be solved next.

Step -  3: Next, the parts of the equation that contain 'Division' and 'Multiplication' are calculated.

Step -  4: Last but not the least, the parts of the equation that contain 'Addition' and 'Subtraction' should be calculated.

Given expression is 

[(169 × 121) ÷ (11 × 13)] - 3 = ?

⇒ [(13 × 13 × 11 × 11) ÷ (11 × 13)] - 3 = ?

⇒ [(11 × 13)] - 3 = ?

⇒ [143] - 3 = ?

⇒ 140 = ?

Given:

tan θ = 1/√5

Formula Used:

tan θ = P/B and Cosec θ = H/P; where H² = P² + B²; H = hypotenuse, P = perpendicular, B = Base

Calculation:

⇒ H² = 1² + √5² = 6

⇒ H = √6

⇒ Cosec θ = H/P = √6/1

⇒ Cosec² θ = 6

We know that,

cotθ = 1/ tanθ 

Cosec²θ - cot²θ = 1

⇒ cosec²θ = 1 + cot²θ      ----(1)

Now, tanθ = 1/√5

⇒ cotθ = √5

Using (1) get,

cosec²θ = 1 + (√5)²

⇒ cosec²θ = 1 + 5 = 6

The correct answer is Golfer.

Key Points

• Gaurav Ghei is an Indian professional golfer who plays on the Asian Tour.
• He was born on 25 September 1968.
• In 1991, he became a professional golfer.
• He won three Asian Tour titles:
• The Gadgil Western Masters(1995)
• The Taiwan Masters(2006)
• The Beijing Open(2007)
• He became the first Indian golfer to qualify for the Open Championship in 1997.
• He represented India in 1997, 2003, and 2007 World Cup.

The correct answer is 1905.

Key Points

• The Indian Railway Board Act was passed in March 1905.
• In 1901, on the advice of the Sir Thomas Robertson Committee on the management and service of the railways, an early version of the railway board was drawn up.
• In 1905, the government of Lord Curzon formalised its powers.
• The Board was appointed by the Department of Commerce and Industry of the British Government of India.
• The Ministry of Railways is the Ministry of Railways of the Government of India, which is responsible for the rail transport of the country.
• The Ministry operates the state-owned Indian Railways, an agency that operates as a railway monopoly and is headed by the Chairman of the Railway Board.
• The Ministry of Railways and the Railway Board are situated within Rail Bhavan, New Delhi.

The correct answer is Development Bank.

Key Points

• The National Bank for Agriculture and Rural Development ( NABARD) is an apex development finance agency solely operated by the Government of India.
• The Bank has been charged with "policy, planning and lending activities related to agriculture and other economic activities in rural areas in India".
• NABARD is active in the adoption of a framework on financial inclusion.
• On 12 July 1982, NABARD was formed on the recommendation of the B.Sivaramman Committee to enact the National Bank for Agriculture and Rural Development Act 1981.
• It replaced the Rural Planning and Credit Cell (RPCC) and Department of Agricultural Credit (ACD) of the Reserve Bank of India and the Agricultural Refinance and Development Corporation (ARDC).
• It is one of the leading construction credit organisations in rural areas.
• NABARD is India's specialized bank for agriculture and rural development in India.

Additional Information

• Formation:  12^th July 1982
• Headquarters: Mumbai, India
• Chairman: Dr. G.R. Chintala

The correct answer is Punjab.

Key Points

• Lala Lajpat Rai was an Indian freedom fighter from the Moga district of Punjab.
• In the Indian Independence Movement, he played a crucial role.
• It was popularly known as Punjab Kesari.
• He was one of the three triumvirates of Lal Bal Pal.
• He was also affiliated with the operations of the Punjab National Bank and Lakshmi Insurance Company in their early years in 1894.
• He was elected president of the Indian National Congress at the Calcutta Session of 1920.
• In 1921, he founded Servants of the People's Society, a non-profit welfare organisation in Lahore, which moved its base to Delhi after partitioning, and has branches in several parts of India.
• Lajpat Rai was a veteran leader of the Indian Nationalist Movement, the Indian Independence Movement led by the Indian National Congress, Arya Samaj and the Hindu Reform Movement.

The correct answer is Motion pictures.

Key Points

• Ben Kingsley (the original name of Krishna Bhanji) a British actor remembered for portraying a wide variety of roles, including the title character in Gandhi (1982), for which he received the Academy Award for Best Actor.
• He was followed in Gandhi by films such as Betrayal (1983), Turtle Diary (1985), and Pascali 's Island (1988).
• He was nominated for the Best Supporting Actor Oscar for his role as Meyer Lansky in Bugsy's Las Vegas Crime Drama (1991).
• He was appointed Knight Bachelor in 2002 to represent the British film industry.
• In 2010, he was awarded the Hollywood Walk of Fame star.
• In 2013, he was awarded the Britannia Award for Worldwide Contribution to Filmed Entertainment.

Given:

G and H can do a work in 30 days and H alone can do it in 50 days, 

Formula Used:

If A and B can complete a job in ‘y’ days and ‘z’ days respectively, then time taken together to complete the job = (y × z)/(y + z) days

Calculation:

Let the time taken by G alone to complete the work be 'g' days

⇒ 30 = (50 × g)/(50 + g)

⇒ 150 + 3g = 5g

⇒ 2g = 150

⇒ g = 75 days

∴ G alone can do it in 75 days

Given:

Cost of rice A = Rs. 210 per kg

Cost of rice B = Rs. 280 per kg

The selling price of the mixed variety of A and B = Rs. 260 per kg

Rice A and Rice B is mixed in the ratio = 3 ∶ 4

Formula used:

Ratio = (Dearer price – mean)/(mean – cheaper price);

Profit% = [(S.P – C.P)/C.P] × 100

Calculation:

Let the cost price of the mixture be Rs. 'x' 

⇒ 3/4 = (280 – x)/(x – 210)

⇒ 3x – 630 = 1120 – 4x

⇒ 3x + 4x = 1120 + 630

⇒ 7x = 1750

⇒ x = 250 

Profit% = [(260 - 250)/250] × 100 = 4%

∴ The profit percentage is 4%.

Symbol representation:

The family tree diagram is shown below:

Hence, ‘Father-in-law ’ is the correct answer.

The correct answer is Agra.

Key Points

• Akbar's seat of Government was Agra.
• Akbar, full name Abu al Fath Jalal al-Din Muhammad Akbar is the greatest of the Mughal emperors of India.
• He reigned from 1556 to 1605 ad extended Mughal Power to most of the Indian Subcontinent.
• In order to preserve the unity of the Empire, Akbar adopted programs that won the loyalty of the Non-Muslim populations of his realm.
• He took an active interest in other religions, persuading  Hindus, Parsis, and Christians, as well as Muslims, to engage in religious discussion before him.
• He encouraged scholars, poets, painters, and musicians, making his court a center of culture.

Additional Information 

• Born: October 15, 1542 (Umarkot, Pakistan)
• Died: October 25, 1605 ( Agra, India)
• Role in: Battles of Panipat, Second Battle of Panipat
• House: Mughal Dynasty
• Father: Humayun
• Son: Jahangir

Given:

A circular ground of radius 7 m is surrounded by a path of width 3.5 m

Calculation:

we have , R = (7 + 3.5) m = 10.5 m, r = 7 

⇒ area of the path = π(R² - r²)

⇒ area of the path = 22/7 × (10.5² - 7²)

⇒ area of the path = 22/7 × [(10.5 + 7)(10.5 - 7)] 

⇒ area of the path = 22/7 × 17.5 × 3.5 = 192.5 sq.m

∴ area of the path = 192.5 sq.m

Given:

P, Q and R can do a work in 10, 15 and 30 days respectively. Pattern of doing work = PQR, P , PQR, P, ...

Concept used:

work = time × efficiency

Calculation:

 work done by P, Q, and R in a day = 6 unit

⇒ According to the given pattern = PQR, P, PQR, P, PQR, P = 6 + 3 + 6 + 3 + 6 + 3 = 27 unit

27 units of work is done in 6 days

⇒ Remaining work = 30 - 27 = 3 unit

According to the pattern next work to be done by PQR together.

⇒ Time required to complete the remaining work = 3/6 = 1/2 days 

∴ Required total number of days to complete the work = 6 + 1/2 = ​6.5 days

Alternate Method

According to the question, 

P, Q, and R together work in first day = 6 unit

Second day P work alone = 3 unit

In 2 days = 6 + 3 = 9 unit 

Multiply by 3 both side 

⇒ 6 days = 27 unit work done

Then next turn work P, Q, and R work together, but the remaining work is 3 unit

⇒ 3/6 

Total Work completed in 6 + 1/2 days 

∴ Required total number of days to complete the work = 6 + 1/2 = ​6.5 days

The mistake point in question is who will work on 1st day. If you carefully read the question you get that P, Q, and R together starts the work on 1st day and then the next day P alone does work. and this pattern will continue till the work is complete. so, the correct answer is 6.5 days.

Here the logic is:

Hence, ‘H’ is the correct answer.

Concept:

Fourth proportion of three numbers a, b, and c = (b × c)/a

Calculation:

Let the fourth proportion be x

⇒ 14/6 = 28/x

⇒ x = 28 × 6/14

⇒ x = 12

∴ The fourth proportion is 12.

Here the logic is:

Similarly,

Hence, ‘PQ : TN’ is the correct answer.

The correct answer is Harmful.

Key Points

• Harmful species are not in the IUCN classification of threatened species.
• IUCN Red List of Threatened Species, also called IUCN Red List, one of the most well-known objective assessment systems for classifying the status of plants, animals, and other organisms threatened with extinction.
• IUCN red list was founded in 1964.
• It uses a set of criteria to evaluate the extinction risk of a thousand of species and subspecies.
• There are 7 categories of the IUCN Red List:
• Data Deficient
• Least concern- unlikely to become extinct in the near future.
• Near Threatened- close to being at high risk of extinction in the near future.
• Vulnerable
• Endangered- very high risk of extinction in the wild.
• Critically Endangered- in a particular and extremely critical state.
• Extinct In The Wild- Survives only in captivity, cultivation, and outside the native range, as presumed after exhaustive surveys.
• Extinct- beyond a reasonable doubt that the species is no longer extant.

Shortcut Trick

Total Simple Interest percentage = 8% × 8 years = 64%.

As per question, 64% → Rs. 16,000 ⇒ 1% = Rs. 250.

New Rate of Interest = 8% ÷ 4 = 2%.

Effective Compound Interest rate for 2 years at 2% = 2 + 2 + (2 × 2)/100 = 4.04%.

Required Compound Interest = 4.04 × 250 = Rs. 1,010.

∴ The correct answer is Rs. 1,010.

Alternate Method

Given:

Simple Interest (SI) = Rs. 16,000 | Rate (R₁) = 8% | Time (T₁) = 8 years

Formula Used:

SI = (P × R × T) ÷ 100

CI = P[(1 + R/100)ⁿ − 1]

Calculations:

⇒ 16,000 = (P × 8 × 8) ÷ 100

⇒ 16,000 = 64P ÷ 100

⇒ P = (16,000 × 100) ÷ 64

⇒ Principal (P) = Rs. 25,000

⇒ New Rate (R₂) = 8% ÷ 4 = 2% p.a.

⇒ New Time (n) = 2 years

⇒ CI = 25,000 × [(1 + 2/100)² − 1]

⇒ CI = 25,000 × [(1.02)² − 1]

⇒ CI = 25,000 × [1.0404 − 1]

⇒ CI = 25,000 × 0.0404 = Rs. 1,010

∴ The correct answer is Rs. 1,010.

Additional Information

Effective Rate for CI

For 2 years, the effective compound interest rate can be calculated using the formula: x + y + (xy/100), where x and y are the rates for the first and second year.

Difference between CI and SI

The difference between Compound Interest and Simple Interest for 2 years is given by: D = P(R/100)².

Amount in CI

The total Amount (A) after n years in compound interest is A = P(1 + R/100)ⁿ.

Here the logic is:

I. V is not shorter than A.

V > A, V = A

II. D is shorter than V.

D <  V

III. A is shorter than D

A < D

Combining all three we get,

A < D <  V

V is the longer among all and A is the shortest among all so we have the relation among them,  V > D > A

Hence, ‘A is shorter than V and D’ is the correct answer.

The correct answer is Tax on profit from the sale of a capital asset during a year.

• A capital gains tax (CGT) is a tax on the profit realized on the sale of a non-inventory asset.
• The most common capital gains are realized from the sale of stocks, bonds, precious metals, real estate, and property.

Additional Information

Types of Taxes:

• There are different types of tax as follows:
• Direct Tax:
• It comprises the tax which we pay directly to the government. These taxes are levied on an individual. Different types of Direct taxes are:
• Income Tax
• Gift Tax
• Wealth Tax
• Capital Gains Tax
• Securities transaction tax
• Corporate tax
• Indirect Tax: 
• ​These taxes are not levied on an individual but on goods and services.
• Various types of Indirect taxes are;-
• Sales Tax
• Services Tax
• Goods and Services Tax
• Value Added Tax
• Customs Duty
• Toll Tax

Given:

D can do a work in 18 days and E can do the same work in half that time.

Formula Used:

If A and B can complete a job in ‘y’ days and ‘z’ days respectively, then time taken together to complete the job = (y × z)/(y + z) days

Calculation:

E can do the same work in half that time = 18/2 = 9 days  

 ∴ required number of days = 18 × 9/(18 + 9) = 6 days

Given:

15 laptops were purchased at Rs. 15,000 each and all of them were sold for Rs. 2.97 Lakh

Formula Used:

profit% = (S.P - C.P)/C.P × 100

Calculation:

⇒ Selling price of each laptop = 297000/15 = 19800

⇒ profit percentage = (19800 - 15000)/15000 × 100 = 32%  

∴ required profit percentage = 32%

The correct answer is 1915.

Key Points

• Mahatma Gandhi returns to India from South Africa on 9 January 1915.
• After arriving in India, Mahatma Gandhi successfully organized Satyagraha Movements in various places.
• Gandhi returned to India from South Africa in 1915 at the request of Gopal Krishna Gokhale.
• Gandhi Ji returns from South Africa can be seen as perfect timing for the future of development of the Indian national movement. Gokhale helped  Gandhiji at the time of hardships in raising funds when Gandhiji was in South Africa.
• Gokhale insisted Gandhiji that he has been far away from his nation. He wanted Gandhiji to come to India and know the situation of India under British Rule.

Important Points

• Things Mahatma Gandhi did in South Africa:
• He organised non-violent protests against the racial discrimination directed towards the native Africans and Indians in 1894.
• He came to India for a short time in 1896 to gather fellow India to serve in South Africa,
• He organised the Indian Ambulance corps for the British during the outbreak of the Boer War in 1899.
• Het set up Phoenix Farm near Durban where Gandhi trained his cadre for peaceful restraint or non-violent Satyagraha.
• He also set up another farm which was Tolstoy Farm which is considered the place where Satyagraha was moulded into a weapon of protest.
• Movements Started by Gandhiji in India:
• Champaran Satyagraha of 1917
• Kheda Satyagrah of 1918
• Khilafat Movement Post World War I
• Non-Co-operation Movement
• Civil Disobedience Movement
• Negotiations over Round Table Conferences
• Gandhi Irwin Pact
• Quit India Movement

Additional Information

Mahatama Gandhi:

• Born: 2 October 1869
• Died: 30 January 1948
• He was undoubtedly a great man, both in personal force and in political effect.
• He was an Indian Lawyer, Politician, social activist, and writer who moulded the character of the struggle for freedom in India, and impressed his own ideals upon the new governing class that came into power when the English went home.

Given:

An amount is deposited at 8% p.a. compound interest.

Formula Used:

Compound interest = Principal × [(1 + rate/100)n - 1]; n = time period

Calculation:

72 = Principal × 8/100   

⇒ Principal = 72 × 100/8 = Rs. 900

again C.I  = 900 × [(1 + 8/100)2 - 1]

⇒ C.I = 900 × [729/625 - 1]

⇒ C.I = Rs. 149.76

⇒ C.I for 2nd year = C.I - C.I for 1st year

⇒ C.I for 2nd year = Rs. (149.76 - 72) = Rs. 77.6

∴ The interest amount for 2^nd year is Rs. 77.6.

Here the logic is:

Grief : Happiness → Grief means sorrow and happiness means pleasure so, antonym of grief is happiness

Similarly,

Diffidence : ?  → Diffidence means shyness so, antonym of diffidence is confidence

Hence, ‘Diffidence : Confidence’ is the correct answer.

Given:

N has Rs. p more than K. The total amount available with N and K together is Rs. q. 

Calculation:

Let the amount available with K = x, then

⇒ amount available with N = x + p

⇒ amount available with K = total amount available with N and K together - amount available with N

⇒ x = q - (x + p)

⇒ 2x = q - p 

⇒ x = $\frac{{\left( {q - p} \right)}}{2}$

Calculation:

Given expression is x : 3/7 : : 7/9 : 5/9

⇒ x × 7/3 = 7 × 9/(5 × 9)

⇒ x = 3/5

∴ The value of 'x' is 3/5.

Concept:

The mode is the value that occurs the most often in a data set

Calculation:

Using the above observations, we have 70 as maximum times i.e. (3 times)

∴ Required mode = 70

Here the logic is:

Hence, ‘MR’ is the correct answer.

Given:

Expression is (1 + 2/3) ÷ [(1 + 1/3) ÷ (2/3 + 1)] = ?

Concept Used:

Calculation:

Given expression is (1 + 2/3) ÷ [(1 + 1/3) ÷ (2/3 + 1)] = ?

⇒ (5/3) ÷ [(4/3) ÷ (5/3)] = ?

⇒ (5/3) ÷ (4/5)

⇒ 25/12

The correct answer is Snake.

Key Points

• Snakes are Carnivores means that they feed only on other animals such as rodents, lizards, and even the eggs of other reptiles.
• The specific food they consume depends upon the snake's size, species, and habitat.
• Snake's jaws have hinges that let them open wide and eat large prey.
• This allows some snakes to eat enormous animals.
• For instance, it is possible, though not usual, for a python to ingest a deer, a small cow, or even a crocodile.
• Snakes do not need to eat every day.
• In general, thin-bodied snakes eat at least once a week. Heavy-bodied snakes dine less frequently. The need to feed depends upon the snake's age and the size of the meal.
• A python or boa typically eats one or two good-sized meals a month.

Additional Information

Omnivores:-

• An omnivore is an animal that has the ability to eat and survive on both plant and animal matter.
• Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutrients and energy of the sources absorbed.

Rat:

• Rats are omnivores, which means they eat plants and animals, but they tend to enjoy different food items.

Ant:

• Ants are omnivores animals and therefore eat a mixture of both plant and animal matter.
• The diet of the ant primarily consists of leaves, fungi, honey, small insects, and dead animals, although the exact diet of the ant depends on the species.

Bear:

• Bears are omnivores and consume more plants than animal matter.

Given:

P :Q : R is 1/3 : 2/3 : 1/4 and Q = 56

Calculation:

Let the value of P, Q and R be x/3, 2x/3 and x/4 respectively

⇒ 2x/3 = 56

⇒ x = 84

⇒ P - R = x/3 - x/4 = 84/3 - 84/4

⇒ P - R = 28 - 21 = 7

∴ required value = 7

The correct answer is Rail Transport.

Key Points

• 'Mission Raftaar' project is associated with Rail Transport.
• With a view to increasing the speed of trains, Indian Railways announced 'Mission Raftaar' in the Railway Budget 2016-17.
• The mission envisages a target of doubling the average speed of freight trains and increasing the average speed of all non-suburban passenger trains by 25 Kmph in the next 5 years.
• Principal routes have been identified for raising speed under Mission Raftaar.
• These are six routes on Golden Quadrilateral and diagonals namely, Delhi- Mumbai, Delhi- Howrah, Howrah- Chennai, Chennai- Mumbai, Delhi- Chennai, and Howrah - Mumbai.
• These six routes carry 58% of freight traffic and 52% of coaching traffic with a share of only 16% of the network.

Additional Information

• Golden Quadrilaterals:
• It is designated as one of the longest highways in the world.
• It is basically a network of highways that connect the four major metropolitan cities of the country in four directions – Delhi (North), Chennai (South), Kolkata (East), and Mumbai (West) – thereby forming a quadrilateral, and hence the name Golden Quadrilateral.
• Launched in 2001, this was the largest highway and a very ambitious project.
• The project, which was undertaken by the National Highways Development Project (NHDP) and managed by the National Highways Authority of India (NHAI), was launched by the then Prime Minister Atal Behari Vajpayee.
• The planning for the project was completed in 1999 but the construction work officially started in 2001.

The correct answer is Cataract.

Key Points

• A cataract is a clouding of the lens, which prevents a clear, sharp image from being produced.
• A cataract forms because the lens is sealed in a capsule and as old cells die they get trapped in the capsule, with time this causes a clouding over of the lens, this clouding results in blurred images.

Additional Information

• Presbyopia:
• The power of accommodation of the eye usually decreases with aging.
• For most people, the near point gradually recedes away.
• They find it difficult to see nearby objects comfortably and distinctly without corrective eye-glasses.
• This defect is called presbyopia.
• It arises due to the gradual weakening of the ciliary muscles and diminishing flexibility of the eye lens.
• Hypermetropia:
• Hypermetropia is also known as far-sightedness.
• A person with hypermetropia can see distant objects clearly but cannot see nearby objects distinctly.
• This defect can be corrected by using a convex lens of appropriate power.
• Myopia:
• Myopia is also known as near-sightedness.
• A person with myopia can see nearby objects clearly but cannot see distant objects distinctly.
• A person with this defect has the far point nearer than infinity. Such a person may see clearly up to a distance of a few meters.
• In a myopic eye, the image of a distant object is formed in front of the retina and not at the retina itself.
• This defect can be corrected by using a concave lens of suitable power.

Calculation:

⇒ number of votes polled by party IV in South constituency = 210,000

⇒ number of votes polled by party III(second highest) in South constituency = 108,000

∴ required votes = 210000 - 108000 = 102000 = 1.02 Lakh

Calculation:

⇒ constituency won by Party I in terms of number of votes = East

⇒ constituency won by Party II in terms of number of votes = North

⇒ constituency won by Party III in terms of number of votes = no such constituency

⇒ constituency won by Party IV in terms of number of votes = South and West

∴ clearly, Party IV has won more than one constituency in the district

Calculation:

⇒ total number of votes polled for East constituency = (180 + 74 + 5 + 34) = 293,000

⇒ total number of votes polled for South constituency = (8 + 70 + 108 + 210) = 396,000

⇒ total number of votes polled for North constituency = (72 + 275 + 44 + 225) = 616,000 

⇒ total number of votes polled for West constituency = (19 + 23 + 101 + 191) = 235,000 

∴ clearly North constituency has the highest total number of votes polled

Total number of votes for Party I in all the districts = 180 + 8 + 72 + 19 = 279

Total number of votes for Party II in all the districts = 74 + 70 + 275 + 23 = 442

Total number of votes for Party III in all the districts = 5 + 108 + 44 + 101 = 258

Total number of votes for Party IV in all the districts = 34 + 210 + 225 + 191 = 660

∴ Party IV polled the highest number of votes in all the districts

Professions- Politician, an actor, a banker, an ex-serviceman, a nurse and a housewife.

R is the ex-serviceman married to a housewife.

P is the wife of R

Q is an actor whose brother T is not a politician.

U is neither a banker nor a politician.

Now, the only profession left with us for U is nurse so, U is the nurse and T is not a politician then T’s profession is banker. The only person remaining with us is S then S’  profession is politician.

Hence, ‘T’ is the banker.

Professions- Politician, an actor, a banker, an ex-serviceman, a nurse and a housewife.

R is the ex-serviceman married to a housewife.

P is the wife of R

Q is an actor whose brother T is not a politician.

U is neither a banker nor a politician.

Now, the only profession left with us for U is nurse so, U is the nurse and T is not a politician then T’s profession is banker. The only person remaining with us is S then S’  profession is politician.

Hence, ‘S’ is the politician.

Professions- Politician, an actor, a banker, an ex-serviceman, a nurse and a housewife.

R is the ex-serviceman married to a housewife.

P is the wife of R

Q is an actor whose brother T is not a politician.

U is neither a banker nor a politician.

Now, the only profession left with us for U is nurse so, U is the nurse and T is not a politician then T’s profession is banker. The only person remaining with us is S then S’  profession is politician.

Hence, ‘U’ is the nurse.

Here the logic is:

River : Bank →  A sloped side of a river acting as a barrier between the water and level ground to either side is called a bank.

Similarly,

Sea : ? → Sea is connected to land with areas called shore.

Hence, ‘Sea : Shore’ is the correct answer.

The correct answer is Swayamsiddha.

Key Points

• Swayamsiddha Foundation works in the field of Women Empowerment through various initiatives such as motivation, training, skill up-gradation, marketing, etc.
• It aids Women Empowerment through interventions in Self Employment and Self Help Groups (SHGs).
• Self Employment:
• Organizing Awareness Programmes on Self Employment.
• Organizing Skill Oriented Training Programmes.
• Providing Business Inputs.
• Providing Handholding Support.
• Providing marketing platform for products of entrepreneurs.
• SHG (Bachat Gats):
• Mentoring of New Groups.
• Strengthening of existing SHGs.
• Registering New & Existing Groups.
• Addressing common problems of SHGs.
• Capacity Building of enrolled SHGs
• Imparting Training to enrolled SHGs
• Assisting SHGs in their endeavour to excel.

Additional Information

• Inclusive education for the disabled at the secondary stage:
• The Centrally Sponsored I.E.D.S.S., The scheme aims to enable all students with disabilities completing eight years of elementary schooling an opportunity to complete four years of secondary schooling (classes IX to XII) in an inclusive and enabling environment.
• It provides educational opportunities and facilities to students with disabilities in the general education system at the secondary level (classes IX to XII) and supports the training of general school teachers to meet the needs of children with disabilities at the secondary level.
• The objectives of the scheme will be to ensure that:
• Every child with a disability will be identified at the secondary level and his educational need assessed
• Every student in need of aids and appliances, assistive devices, will be provided the same
• All architectural barriers in schools are removed so that students with disability have access to classrooms, laboratories, libraries, and toilets in the school
• Each student with a disability will be supplied learning material as per her requirement
• All general school teachers at the secondary level will be provided basic training to teach students with disabilities within a period of three to five years Students with disabilities will have access to support services like the appointment of special educators, the establishment of resource rooms in every block
• Model schools are set up in every state to develop good replicable practices in inclusive education.
• Sarva Shiksha Abhiyan:
• Sarva Shiksha Abhiyan (SSA) is the Government of India's flagship programme for the achievement of Universalization of Elementary Education (UEE) in a time-bound manner, as mandated by the 86th amendment to the Constitution of India making free and compulsory Education to the Children of 6-14 years age group, a Fundamental Right.
• SSA is being implemented in partnership with State Governments to cover the entire country and address the needs of 192 million children in 1.1 million habitations.
• The programme seeks to open new schools in those habitations which do not have schooling facilities and strengthen existing school infrastructure through provision of additional classrooms, toilets, drinking water, maintenance grant and school improvement grants.
• Existing schools with inadequate teacher strength are provided with additional teachers, while the capacity of existing teachers is being strengthened by extensive training, grants for developing teaching-learning materials and strengthening of the academic support structure at a cluster, block and district level.
• SSA seeks to provide quality elementary education including life skills. SSA has a special focus on girl's education and children with special needs. SSA also seeks to provide computer education to bR&Dge the digital divide.
• Right to Education:
• The Right of Children to Free and Compulsory Education Act or Right to Education Act (RTE), is an Act of the Parliament of India enacted on 4 August 2009, which describes the modalities of the importance of free and compulsory education for children between 6 and 14 in India under Article 21a of the Indian Constitution.

Given:

A man buys a refrigerator at Rs. 22,000 and pays an additional Rs. 1,000 for transport and Rs. 2,000 for installation.

Formula Used:

profit% = (S.P - C.P)/C.P × 100

Calculation:

Let the selling price of the refrigerator be Rs. 'x'

⇒ cost price of refrigerator to man = (22000 + 1000 + 2000) = Rs. 25000

⇒ 15 = (x - 25000)/25000 × 100

⇒ 15 × 250 = (x - 25000)   

⇒ 3750 = (x - 25000)

⇒ x = 28750

∴ required selling price of the refrigerator = Rs. 28750

The correct answer is Geographers.

Key Points

• Geographers study the Earth and the distribution of its land, features, and inhabitants.
• They also examine political or cultural structures and study the physical and human geographic characteristics of regions ranging in scale from local to global
• Geographers typically do the following:
• Gather geographic data through field observations, maps, photographs, satellite imagery, and censuses
• Conduct research via surveys, interviews, and focus groups
• Create and modify maps or other visual representations of geographic data
• Analyze the geographic distribution of physical and cultural characteristics and occurrences
• Collect, analyze, and display geographic data with Geographic Information Systems (GIS)
• Write reports and present research findings
• Assist, advise, or lead others in using GIS and geographic data
• Link geographic data with data pertaining to a particular specialty, such as economics, the environment, health, or politics

​

Additional Information

• Historians: A historian is a person who specializes in the study of history, and who writes books and articles about it.
• Biographers: A biographer is a writer who specializes in true stories of other people's lives. The finished books that biographers publish are called biographies.

Calculation:

⇒ 143 = 11 × 13

⇒ 77 = 7 × 11

⇒ 121 = 11 × 11 

∴ clearly 11 is the highest common factor

Here the logic is:

Hence, ‘20’ is the correct answer.

The correct answer is Plain Glass.

Key Points

Given:

Numbers are 24, 96 and 36.

Calculation:

24 = 2³ × 3

96 = 2⁵ × 3

36 = 2² × 3²

∴ Required LCM = 2⁵ × 3² = 288

The correct answer is  Storage medium.

Key Points

• CD-ROM, an abbreviation of compact disc read-only memory, type of computer memory in the form of a compact disc that is read by optical means.
• A CD-ROM drive uses a low-power laser beam to read digitized (binary) data that has been encoded in the form of tiny pits on an optical disk.
• The drive then feeds the data to a computer for processing.
• With a storage capacity of 680 megabytes, the CD-ROM found rapid commercial acceptance as an alternative to so-called floppy disks.
• Unlike conventional magnetic storage technologies (e.g., tapes, floppy disks, and hard disks), CDs and CD-ROMs are not recordable hence the tag “read-only.”

Additional Information

• MP3 File:
• MP3 (MPEG-1 Audio Layer-3) is a standard technology and format for compressing a sound sequence into a very small file while preserving the original level of sound quality when it is played.
• MP3 provides near CD-quality audio.
• It is one of the most common music file types.
• Microprocessor:
• A microprocessor is an electronic component that is used by a computer to do its work.
• It is a central processing unit on a single integrated circuit chip containing millions of very small components including transistors, resistors, and diodes that work together.
• Magnetic Disk:
• A magnetic disk is a storage device that uses a magnetization process to write, rewrite, and access data.
• It is covered with a magnetic coating and stores data in the form of tracks, spots, and sectors.
• Hard disks, zip disks, and floppy disks are common examples of magnetic disks.

Symbol representation:

The family tree diagram is shown below:

Hence, ‘Mother’ is the correct answer.

The correct answer is Matheran Hill Railway.

Important Points

• Matheran Hill Railway:
• It is a Narrow Gauge heritage railway station in Maharashtra.
• It is administrated under the central Railway.
• The Matheran Hill Railway is on the tentative list of UNESCO World Heritage Sites.

Additional Information

• Three mountain railways of India are on the list of UNESCO World Heritage Site.
• Darjeeling Himalayan Railway, West Bengal
• Nilgiri Mountain Railway, Tamil Nadu
• Kalka Shimla Railway, Himachal Pradesh

Key Points

• Total 40 Unesco World Heritage Sites is in India.
• Cultural- 32
• Natural- 7
• Mixed- 1

The correct answer is 4.

Key Points

• Conditions for Recognition as a National Party:
• If it secures six percent of valid votes polled in any four or more states at a general election to the Lok Sabha or to the legislative assembly; and, in addition, it wins four seats in the Lok Sabha from any state or states.
• If it wins two percent of seats in the Lok Sabha at a general election; and these candidates are elected from three states.
• If it is recognised as a state party in four states.

Additional Information

• For recognition as a State Party, any one of five conditions needs to be satisfied:
• Two seats plus a 6% vote share in the last Assembly election in that state.
• One seat plus a 6% vote share in the last Lok Sabha election from that state.
• 3% of the total Assembly seats or 3 seats, whichever is more.
• One of every 25 Lok Sabha seats (or an equivalent fraction) from a state.
• An 8% state-wide vote share in either the last Lok Sabha or the last Assembly polls.

It is true that nowadays, more people opt for fast food but the reason is not the complete explanation behind the assertion because some fast food prices are even more expensive than a normal healthy meal.

Hence, ‘ A is true, but R is false’ is the correct answer.

The correct answer is Virat Kohli.

Key Points

• Virat Kohli was named the captain of the T20 WC 2016 team.
• The team includes four England players and two West Indies players.
• Jasoy Roy and Quinton de Kock were named the openers in the playing XI while Kohli, Joe Root, Jos Buttler form the middle order of the team.

• New Zealand's captain Kane Williamson has been named captain of an ICC Men's Cricket World Cup 2019 team.

Additional Information

• International Cricket Council:
• It is the world governing body of cricket.
• It was founded as the Imperial Cricket Conference in 1909 by representatives from Australia, England, and South Africa.
• The ICC has 104 member nations currently: 12 Full Members that play Test matches and 92 Associate Members.

Here the logic is:

ADC → 1 × 4 × 3 = 12

Similarly,

BEC → 2 × 5 × 3 = 30

Hence, ‘30’ is the correct answer.

Let’s unjumbled the given options:

 AFMR ⇒ FARM

 NDAL ⇒ LAND

 PLCA  ⇒ CLAP ⇒ Not related to agriculture rest three words are related to agriculture

 TLPNA ⇒ PLANT

Hence, ‘PLCA’ is the correct answer.

Given:

The simple interest at R % p.a. on a certain principal P is (9/16)th of P and R is equal to the number of years (N).

Formula Used:

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

Calculation:

⇒ 9P/16 = P × N × N/100

⇒ N² = 900/16

⇒ N = 30/4 = 7.5 years 

∴ required number of years = 7.5 years

Calculation:

Given expression is 40% of 3/5th of 24 

⇒ 40/100 × 3/5 × 24

⇒ 288/50

⇒ 5.76 

∴ required value = 5.76

The correct answer is Chandigarh.

Key Points

• The Architectural Work of Le Corbusier comprises 17 locations designed by the renowned French-Swiss architect, who is seen as one of the pioneers of modern architecture.
• Chandigarh Capitol Complex, located in Chandigarh city in India.
• It is a UNESCO World Heritage Sites.

Additional Information

• UNESCO World Heritage Sites:
• A World Heritage Site is a place that is listed by UNESCO for its special cultural or physical significance.
• The list of World Heritage Sites is maintained by the international 'World Heritage Programme', administered by the UNESCO World Heritage Committee.
• The United Nations Educational, Scientific and Cultural Organization (UNESCO) seeks to encourage the identification, protection, and preservation of cultural and natural heritage around the world considered to be of outstanding value to humanity.
• This is embodied in an international treaty called the Convention concerning the Protection of the World Cultural and Natural Heritage, adopted by UNESCO in 1972.
• India has 44 world heritage sites that include 36 Cultural properties, 7 Natural properties, and 1 mixed site.

The correct answer is Assam.

Important Points

State Animals, Birds, Trees and Flowers of India:

In the statement, it is mentioned that life has become very difficult without a mobile phone. Hence, conclusion II is true because it is said that mobile has become an integral part of life but no information regarding the increasing number of subscribers is mentioned in conclusion I. Hence, ‘only conclusion II follows’ is the correct answer.

From statement I → At present, X is 3 times as old as Y → Suppose Y present age is - Y then X present age is - 3Y

From statement III → After 5 years Y age is - (Y + 5) and X age is - (3Y + 5)

Now, the age of X will be 2 1/2 times that of Y, we get the equation - 3Y + 5 = 5/2 × (Y + 5)

3Y + 5 = 5/2 × Y + 5/2 × 5

2 × (3Y + 5) = 5Y + 25

6Y + 10 = 5Y + 25

6Y - 5Y = 25 - 10

Y = 15 

So, Y present age is 15 years

Hence, ’both statements I and III are sufficient’ is the correct answer.

Here the logic is:

Jupiter : Europa → Europa is one of the galilean moons of Jupiter and Jupiter is the fifth planet from the Sun and the largest in the Solar System.

Similarly,

Earth: ? → The Moon is Earth’s only natural satellite and the fifth largest moon in the solar system.

Hence, ‘ Earth : Moon’ is the correct answer.

Note: the question has been modified as it was incomplete.

Given:

Car I covers a distance in a certain time. Car II takes double the time to cover half the same distance. 

Formula Used:

Distance = speed × time

Calculation:

Car II takes double the time to cover half the same distance, so Car II will take quadruple (× 4) the time to cover the same distance.

when distance remains constant, then speed is indirectly proportional to time.

⇒ speed of Car I/speed of Car II = time taken by Car II/time taken by Car I

⇒ speed of Car I/speed of Car II = 4/1

∴ required ratio = 4/1

Here the logic is:

B : 8 → 2 : 2³  → 2 : 8

Similarly,

C : ?  → 3 : 3³  → 3 : 27

Hence, ‘C : 27’ is the correct answer.

The correct answer is Afforestation.

Key Points

• Afforestation:
• Afforestation is the establishment of a forest or stands of trees in an area where there was no previous tree cover.
• Many government and non-governmental organizations directly engage in programs of afforestation to create forests, increase carbon capture.
• It enables investors to plant the kind of trees according to demand, advancing the quick propagation of particular sorts of trees.

Important Points

• Five Major Environment problems:
• Genetic modification of food
• Water (Acid Rain)
• Loss of Biodiversity
• Deforestation
• Climate change

The correct answer is Supersonic.

Key Points

• Supersonic:
• It is the speed of an object that exceeds the speed of sound.
• Supersonic describes things that can travel faster than the speed of sound.
• Infrasonic:
• Below the audibility range.
• Ultrasonic:
• ​Above the audibility range.
• Audible Sound 20 Hz to 20 kHz for humans.

Here the logic is:

Hence, ‘PRQS’ is the correct answer.

The correct answer is Polarity cannot be changed.

Key Points

• Electromagnets:
• The electromagnet is a device consisting of a core of magnetic material surrounded by a coil.
• An electric current is passed through this coil to magnetize the core.
• This is made out of a coil of wire.
• This coiled wire technique is more effective in producing a magnetic field than just a wire running straight.
• This effect can be strengthened by winding a wire tightly around a powerful core, made of magnetic material.
• It is a temporary type of magnet.
• Ferromagnetic materials are attracted by magnets.
• Like poles repel each other while unlike poles attract each other.
• Its strength can be changed.
• Its strength varies with the air gap between its poles.

The correct answer is The air we breathe.

Key Points

• Breathing Air
• Air is the necessary component of our breath.
• Air has a mixture of lots of gases.
• The main components of the air are Nitrogen and Oxygen.
• The rest of the components are carbon dioxide, helium, argon, ozone, and hydrogen.

Additional Information

Components in the Breathing Air