Practise UPSC MCQs with explanations

Consider the following: 1. 1000 litres = 1 m³ 2. 1 metric ton = 1000 kg 3. 1 hectare = 10000 m² Which of the above are correct?

A father said to his son, 'n years back I was as old as you are now. My present age is four times your age n years back.' If the sum of the present ages of the father and the son is 130 years, what is the difference in their ages?

In an examination, 80% of students passed in English, 70% of students passed in Hindi, and 15% failed in both subjects. What is the percentage of students who failed in only one subject?

A number is mistakenly divided by 4 instead of being multiplied by 4. What is the percentage change in the result due to this mistake?

Based on the above passage, the following assumptions have been made: 1. Travel leads to an understanding of humans. 2. Travel helps those who wish to learn fundamental common values. 3. A person with long experience in travel can resolve differences amongst people. Which of the assumptions given above are valid?

When we meet other people while we travel, we learn to differentiate between:

Which of the following is/are emphatically conveyed by the author of the passage? 1. Without science, mankind could not have continued to exist till today. 2. It is the science that will ultimately determine the destiny of mankind.

Based on the above passage, the following assumptions have been made: 1. The horrors of modern life are the inevitable result of the progress of science. 2. The aspect of truth likely to be overlooked is that science is what man has made it. Which of the assumptions given above is/are correct?

What is the angle between the minute hand and hour hand when the clock shows 4:25 hours?

Let p, q, r and s be distinct positive integers. Let p, q be odd and r, s be even. Consider the following statements: 1. (p - r)² (qs) is even. 2. (q - s)²qs is even. 3. (q + r)² (p + s) is odd. Which of the statements above are correct?

The calendar for the year 2025 is same for which year?

How many times do the hour hand and the minute hand coincide in a clock between 10:00 a.m. and 2:00 p.m. (same day)?

Which of the following statements best reflects the central idea of the above passage?

Based on the above passage, the following assumptions have been made: 1. The adolescent does not feel comfortable with his parents because they tend to be dominating and assertive. 2. The adolescent of modern times does not have much respect for parents. Which of the assumptions given above is/are valid?

Based on the above passage, the following assumptions have been made: 1. As a large number of workers in our country are employed in the unorganized sector, India does not need to change its present conventional classroom system of education. 2. Even with its present conventional classroom system of education, India produces sufficient number of skilled workers to fully realize the benefits of demographic dividend. Which of the assumptions given above is/are valid?

Which of the following statements best reflects/reflect the most logical and rational inference/inferences that can be made from the passage?

If the sum of the two-digit numbers AB and CD is the three-digit number 1CE, where the letters A, B, C, D, E denote distinct digits, then what is the value of A?

A person buys three articles P, Q and R for ₹3,330. If P costs 25% more than R and Q costs 20% more than R, then what is the cost of P?

What is the sum of the first 28 terms in the following sequence? 1, 1, 2, 1, 3, 2, 1, 4, 3, 2, 1, 5, 4, 3, 2 ...

What is the number of fives used in numbering a 260-page book?