UPSC Civil Service Prelims Paper II 2025 (CSAT) | UPSC Civil Service Year Wise Previous Years Questions

Basic Numeracy

1. A natural number $N$ is such that it can be expressed as $\mathbf{N}=\mathbf{p}+\mathbf{q}+\mathbf{r}$, where $\mathbf{p 2. Three prime numbers $p, q$ and $r$, each less than 20 , are such that $p-q=q-r$. How many distinct possible values can w 3. How many possible values of $(p+q+r)$ are there satisfying $\frac{1}{p}+\frac{1}{q}+\frac{1}{r}=1$, where $p, q$ and $r$ 4. Team $X$ scored a total of $N$ runs in 20 overs. Team $Y$ tied the score in $10 \%$ less overs. Had team Y's average run 5. The price (p) of a commodity is first increased by $\mathbf{k} \boldsymbol{\%}$; then decreased by $\mathrm{k} \%$; agai 6. The petrol price shot up by $10 \%$ as a result of the hike in crude oil prices. The price of petrol before the hike was 7. A 4-digit number $N$ is such that when divided by $3,5,6$, 9 leaves a remainder $1,3,4,7$ respectively. What is the smal 8. What is the unit digit in the multiplication of $1 \times 3 \times 5 \times 7 \times 9 \times \ldots \times 999$ ? 9. Consider the first 100 natural numbers. How many of them are not divisible by any one of $2,3,5,7$ and 9 ? 10. If $4 \leq x \leq 8$ and $2 \leq y \leq 7$, then what is the ratio of maximum value of $(x+y)$ to minimum value of $(x-y 11. Let both $p$ and $k$ be prime numbers such that $\left(p^2+k\right)$ is also a prime number less than 30 . What is the n 12. There are $n$ sets of numbers each having only three positive integers with LCM equal to 1001 and HCF equal to 1 . What 13. Let PQR be a 3-digit number, PPT be a 3-digit number and $\mathbf{P S}$ be a 2-digit number, where $\mathbf{P}, \mathbf{ 14. What is the maximum value of $n$ such that $7 \times 343 \times 385 \times 1000 \times 2401 \times 77777$ is divisible b 15. $P$ and $Q$ walk along a circular track. They start at 5:00 a.m. from the same point in opposite directions. $P$ walks a 16. A tram overtakes 2 persons $X$ and $Y$ walking at an average speed of $3 \mathrm{~km} / \mathrm{hr}$ and $4 \mathrm{~km} 17. If $N^2=12345678987654321$, then how many digits does the number N have? 18. A set $(X)$ of 20 pipes can fill $70 \%$ of a tank in 14 minutes. Another set ( $\mathbf{Y}$ ) of 10 pipes fills 3/8th o 19. If $n$ is a natural number, then what is the number of distinct remainders of $\left(1^n+2^n\right)$ when divided by 4 ? 20. Let $P=Q Q Q$ be a 3-digit number. What is the HCF of P and 481 ? 21. What is the 489 th digit in the number $123456789101112 \ldots$ ? 22. The 5-digit number PQRST (all distinct digits) is such that $\mathbf{T} \neq \mathbf{0} . \mathbf{P}$ is thrice $\mathbf 23. $\mathbf{X}$ can complete one-third of a certain work in $\mathbf{6}$ days, $\mathbf{Y}$ can complete one-third of the s 24. Consider the following statements: I. There exists a natural number which when increased by $50 \%$ can have its number 25. What is the remainder when $9^3+9^4+9^5+9^6+\ldots+9^{100}$ is divided by 6 ? 26. In a T20 cricket match, three players X, Y and Z scored a total of 37 runs. The ratio of number of runs scored by $\math 27. Let $p+q=10$, where $p, q$ are integers. Value-I $=$ Maximum value of $\mathbf{p} \times \mathbf{q}$ when $\mathbf{p}, \ 28. Consider a set of 11 numbers: Value-I = Minimum value of the average of the numbers of the set when they are consecutive 29. The average of three numbers $p, q$ and $r$ is $k . p$ is as much more than the average as $q$ is less than the average. 30. Let $x$ be a real number between 0 and 1 . Which of the following statements is/are correct? I. $x^2>x^3$. II. $x>\sqrt{ 31. The difference between any two natural numbers is 10 . What can be said about the natural numbers which are divisible by

Comprehension

Data Interpretation

1. A question is given followed by Statements I and II. Consider the Question and the Statements and mark the correct optio 2. A question is given followed by two Statements I and II. Consider the Question and the Statements and mark the correct o 3. A question is given followed by two Statements I and II. Consider the Question and the Statements and mark the correct o 4. A question is given followed by two Statements I and II. Consider the Question and the Statements and mark the correct o 5. A question is given followed by two Statements I and II. Consider the Question and the Statements and mark the correct o

Logical Reasoning and General Mental Ability

1. What comes at $X$ and $Y$ respectively in the following sequence? January, January, December, October, X, March, October 2. A solid cube is painted yellow on all its faces. The cube is then cut into 60 smaller but equal pieces by making the min 3. If $7 * 24=25$ and $12 * 16=20$, then what is $16^* 63$ equal to? 4. Consider the following statements: I. If $\mathrm{A} \leq \mathrm{B}>\mathrm{C}\mathrm{E}>\mathrm{F} \geq \mathrm{G}=\ma 5. Consider the sequence AB_CC_A_BCCC_BBC_C that follows a certain pattern. Which one of the following completes the sequen 6. What is $\mathbf{X}$ in the sequence $$ 24, X, 12,18,36,90 ? $$ 7. If $\mathbf{P}=+, \mathbf{Q}=-, \mathbf{R}=\times, \mathbf{S}=\div$, then insert the proper notations between the succes 8. A mobile phone has been stolen. There are 3 suspects $P$, $\mathbf{Q}$ and $\mathbf{R}$. They were questioned knowing th 9. Three teams $\mathbf{P}, \mathbf{Q}, \mathbf{R}$ participated in a tournament in which the teams play with one another e 10. $P$ is the brother of $Q$ and R. S is R's mother. T is P's father. How many of the following statements are definitely t 11. If NO is coded as 210,NOT is coded as 4200 and NOTE is coded as 21000 , then how is NOTES coded? 12. If FRANCE is coded as 654321 and GERMANY is coded as 9158437 , then how is YEMEN coded? 13. What is $\mathbf{X}$ in the sequence $1,3,6,11,18, X, 42$ ? 14. There are 7 places $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}, \mathrm{E}, \mathrm{F}$ and G in a city connected by 15. In a certain code if 64 is written as 343 and 216 is written as $\mathbf{7 2 9}$, then how is $\mathbf{5 1 2}$ written i

Basic Numeracy

Comprehension

Data Interpretation

Logical Reasoning and General Mental Ability

UPSC Civil Service Prelims Paper II 2025 (CSAT)

MCQ (Single Correct Answer)

+2.5

-0.883

"A network of voluntary associations stands as a 'buffer' between the relatively powerless individual and the potentially powerful State."

There are 7 places $\mathrm{A}, \mathrm{B}, \mathrm{C}, \mathrm{D}, \mathrm{E}, \mathrm{F}$ and G in a city connected by various roads $\mathrm{AB}, \mathrm{AC}, \mathrm{CD}, \mathrm{DE}, \mathrm{BF}, \mathrm{EG}$ and FG. A is 6 km south of B. A is 10 km west of C. D is 5 km east of $E$. $C$ is 6 km north of $D$. $F$ is 9 km west of $B . F$ is 12 km north of $G$. A person travels from $D$ to F through these roads. What is the distance covered by the person?

20 km

25 km

31 km

37 km

UPSC Civil Service Prelims Paper II 2025 (CSAT)

MCQ (Single Correct Answer)

+2.5

-0.883

"A network of voluntary associations stands as a 'buffer' between the relatively powerless individual and the potentially powerful State."

In a certain code if 64 is written as 343 and 216 is written as $\mathbf{7 2 9}$, then how is $\mathbf{5 1 2}$ written in that code?

1000

1331

1728

2197

UPSC Civil Service Papers