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Prelims

UPSC Prelims Questions

Practice UPSC Prelims MCQs by subject and year. Free questions with explanations for focused revision.

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  2. /Prelims Questions
Q.5257·Miscellaneous·2020·Easy

The ages of 7 family members are 2, 5, 12, 18, 38, 40 and 60 years respectively. After 5 years a new member aged x years is added. If the mean age of the family now goes up by 1·5 years, then what is the value of x?

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Q.5258·Miscellaneous·2020·Easy

The mean weight of 100 students in a class is 46 kg. The mean weight of boys is 50 kg and that of girls is 40 kg. The number of boys exceeds the number of girls by

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Q.5259·Miscellaneous·2020·Easy

What is the algebraic sum of the deviations from the mean of a set of values 25, 65, 73, 75, 83, 76, 17, 15, 7, 14?

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Q.5260·Miscellaneous·2020·Easy

The mean of five observations x, x + 2, x + 4, x + 6, x + 8 is m. What is the mean of the first three observations?

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Q.5261·Miscellaneous·2020·Easy

In this question there is six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : Regular exercise makes many of the organ systems become more efficient. S6 : Different activities require different levels of fitness. P : It can improve your strength; make your body more flexible and less likely to suffer from sprain. Q : It can also improve your endurance. R : It also uses up energy and helps to prevent large amounts of fat building up in the body. S : Exercise can increase your fitness in three ways.

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Q.5262·Miscellaneous·2020·Easy

In this question there is six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : Politics is exciting because people disagree. S6 : It is not solitary people who make politics and a good society; it is the people together which make good politics and society. P : For Aristotle politics is an attempt to create a good society because politics is, above all, a social activity. Q : They also disagree about how such matters should be resolved, how collective decision should be made and who should have a say. R : They disagree about how they should live. S : Who should get what? How should power and other resource be distributed? Should society be based on cooperation or conflict? And so on.

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Q.5263·Miscellaneous·2020·Easy

What is the median of 2, 4, 6, ..., 100?

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Q.5264·Miscellaneous·2020·Easy

If the sum of all interior angles of a regular polygon is twice the sum of all its exterior angles, then the polygon is

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Q.5265·Miscellaneous·2020·Easy

The harmonic mean and the geometric mean of two numbers are 10 and 12 respectively. What is their arithmetic mean?

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Q.5266·Miscellaneous·2020·Easy

In this question there is six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : The ecosystem of water is complex and many environmental factors are intricately linked. S6 : The trees slowly transfer rainwater into the sub-soil and this is critical for sustaining water for months after the rains. P : Thick forests make for excellent catchments. Q : The problems we see are because we have undermined these links over decades. R : First, rain and snowfall are the only sources of water – about 99%. S : In the four months of monsoon, there are about 30–35 downpours and the challenge is to hold this water in systems that can last us over 365 days.

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Q.5267·Miscellaneous·2020·Easy

In this question there is six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : All living things affect the living and non-living things around them. S6 : This interdependability needs to be understood when we, humans consume much more than required and abuse nature. P : This can also affect the population of fox, if foxes depend on rabbits for food. Q : For example, earthworms make burrows and worm casts. R : This act of earthworms affects the soil, and therefore the plants growing in it. S : The energy supplied by heat overcomes the forces of attraction between the particles.

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Q.5268·Miscellaneous·2020·Easy

In this question there is six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : Hormones have several functions in the body. S6 : The two hormones together regulate the glucose level in the blood. P : They help to maintain the balance of biological activities in the body. Q : Insulin is released in response to the rapid rise in blood glucose level. R : On the other hand hormone glucagon tends to increase the glucose level in the blood. S : The role of insulin in keeping the blood glucose level within the narrow limit is an example of this function.

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Q.5269·Miscellaneous·2020·Easy

In this question there is six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : Palaeontology is the study of the remains of dead organisms over enormous spans of time. S6 : Faunal analysis gives information about the animal people hunted and domesticated, the age of animal at death, and the diseases that afflicted them. P : Bones provide a great information. Q : The distribution of faunal remains (animal bones) at a site can indicate which areas were used for butchering, cooking, eating, bone tool making and refuse dumping. R : Within this discipline, molecular biology and DNA studies have been used to understand hominid evolution. S : Hominid evolution answers the questions about what ancient people looked like, and to plot patterns of migration.

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Q.5270·Miscellaneous·2020·Easy

Which one of the following alternatives has the correct spelling?

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Q.5271·Miscellaneous·2020·Easy

In this question there is six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : Central government receipts can broadly be divided into non-debt and debt receipts. S6 : This is also evident from the composition of non-debt receipts. P : Debt receipts mostly consist of market borrowing and other liabilities which the government is obliged to repay in the future. Q : The non-debt receipts comprise of tax revenue, non-tax revenue, recovery of loans and disinvestment receipts. R : The outcomes as reflected in the Provisional Actual figures is lower than the budget estimate owing to reduction in the net tax revenue. S : The Budget 2018–19 targeted significantly high growth in non-debt receipts of the Central Government, which was driven by robust growth.

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Q.5272·Miscellaneous·2020·Easy

In this question there is six sentences of a passage. The first and sixth sentences are given in the beginning as S1 and S6. The middle four sentences in each have been jumbled up and labelled as P, Q, R and S. You are required to find the proper sequence of the four sentences and mark your response accordingly. S1 : The country’s economy is growing and would continue to grow at a rapid pace in the coming years. S6 : The market share of electrical vehicles increases with increasing availability of infrastructure. P : It also provides us an opportunity to grow as manufacturer of electric vehicles. Q : According to NITI Aayog (2019), if India reaches an electric vehicles sales penetration, emission and oil savings can be achieved. R : Given the commitments that India has made on the climate front as a nation and on environmental aspects, it is likely that larger and larger share of automobile sector would be in the form of electric vehicles. S : This presents a great opportunity for the automobile industry as the demand for automobiles would only increase.

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Q.5273·Miscellaneous·2020·Easy

The National Disaster Management Authority functions under the Ministry of

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Q.5274·Miscellaneous·2020·Easy

Who among the following formed the National Liberation Federation (Liberal Party) ?

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