UPSC CSAT Previous Year Questions

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Q16CSAT 2025Divisibility Rules

How many integers between 1 and 1000, both inclusive, are divisible by 2 or 5 but not by both?

Q17CSAT 2025Fundamental Arithmetical Operations

If

P = +, Q = −, R = ×, S = ÷

then insert the proper notations between the successive numbers in the equation:

60 _ 15 _ 3 _ 20 _ 4 = 20

Q18CSAT 2025LCM & HCF

There are n sets of numbers, each having only three positive integers with LCM equal to 1001 and HCF equal to 1. What is the value of n?

Q19CSAT 2025Mathematical Reasoning StatementsData Sufficiency

Is (p+q)2−4pq(p + q)^{2} - 4pq
where pp and qq are natural numbers, positive?

Statement I: p<qp < q

Statement II: p>qp > q

Which one of the following is correct?

Q20CSAT 2025Mathematical Reasoning StatementsData Sufficiency

Let P,Q,R,SP,Q,R,S be distinct non-zero digits.

If PP×PQ=RRSSPP \times PQ = RRSS

Where P≤3,Q≤4,P \leq 3,\ Q \leq 4,
then what is QQ equal to?

Statement I: R=1R = 1

Statement II: S=2S = 2

Which one of the following is correct?

Q21CSAT 2025Number System

What is the unit digit in the multiplication of 1 × 3 × 5 × 7 × 9 × ... × 999 ?

Q22CSAT 2025Pipes and Cisterns

A set of 20 pipes can fill 70% of a tank in 14 minutes. Another set of 10 pipes can fill 3/8 of the tank in 6 minutes. A third set of 16 pipes can empty half of the tank in 20 minutes.

If half of the pipes in the first set are closed, half of the pipes in the second set remain open, and all pipes in the third set remain open, how much time will be required to fill 50% of the tank?

Q23CSAT 2025Ratio and Proportion

In a T20 cricket match, three players X, Y and Z scored a total of 37 runs. The ratio of the runs scored by X to Y is equal to the ratio of the runs scored by Y to Z.

Value-I = Runs scored by X
Value-II = Runs scored by Y
Value-III = Runs scored by Z

Which one of the following is correct?

Q24CSAT 2025Time and Distance

P and Q start from the same point of a circular track at 5:00 AM and move in opposite directions. P completes 5 rounds/hour and Q completes 3 rounds/hour. How many times do they cross between 5:20 AM and 7:00 AM?

Q25CSAT 2025Time and Distance

A tram overtakes two people walking in the same direction at 3 km/h and 4 km/h. It completely passes them in 8 seconds and 9 seconds respectively. Find the length of the tram.

Q26CSAT 2025Time and Work

X can complete one-third of a certain work in 6 days, Y can complete one-third in 8 days, and Z can complete three-fourths in 12 days. All three work together for nn days. Then X and Z leave, and Y alone completes the remaining work in 8238\frac{2}{3} days. Find nn.

Q27CSAT 2024Alphabet Test

Consider the sequence A_BCD_BBCDABC_DABC_D that follows a certain pattern. Which one of the following completes the sequence?

Q28CSAT 2024Average

The total weight of 6 boys equals the total weight of 4 women. The average weight of the women is 63 kg. What is the average weight of the boys?

Q29CSAT 2024Basic Set TheoryVenn DiagramsPercentage

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

Q30CSAT 2024Calendars

The calendar for the year 2025 is same for:

Year-wise CSAT papers

Topic-wise CSAT PYQs

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