UPSC CSE Prelims CSAT (Paper II) previous year questions on Relationship Puzzles (Logical Reasoning), asked from 2017–2026, with answers. There are 8 questions in this post. Attempt each question, then click Show Answer to check.
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1] P has a son and a daughter. S is the mother of T. S is R’s spouse. Q and R are children of P. Then how is Q related to S? [2026/44]
(a) Q is a sister of S
(b) Q is a daughter of S
(c) Q is the mother of S
(d) Q is a sister of the husband of S
Show Answer
Ans: (d) Q is a sister of the husband of S
2] 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 true?
I. S and T are a couple.
II. Q is T’s son.
III. T is Q’s father.
IV. S is P’s mother.
V. R is T’s daughter.
VI. P is S’s son.
Select the correct answer using the code given below: [2025/55]
(a) Only two
(b) Only three
(c) Only four
(d) Only five
Show Answer
Ans: (c) Only four
3] Consider the following including the Question and the Statements:
There are 5 members A, B, C, D, E in a family.
Question: What is the relation of E to B?
Statement-I: A and B are a married couple.
Statement-2: D is the father of C.
Statement-3: E is D’s son.
Statement-4: A and C are sisters.
Which one of the following is correct in respect of the above Question and Statements? [2023/39]
(a) Statement-1, Statement-2 and Statement-3 are sufficient to answer the Question.
(b) Statement-1, Statement-3 Statement-4 are sufficient to answer the Question.
(c) All four statements together are sufficient to answer the Question.
(d) All four statements are not sufficient to answer the Question.
Show Answer
Ans: (c) All four statements together are sufficient to answer the Question.
4] P, Q, R, S, T and U are six members of a family. R is the spouse of Q. U is the mother of T and S is the daughter of U. P’s daughter is T and R’s son is P. There are two couples in the family. Which one of the following is correct? [2022/36]
(a) Q is the grandfather of T
(b) Q is the grandmother of T
(c) R is the mother of P
(d) T is the granddaughter of Q
Show Answer
Ans: (x)
5] A family of two generations consisting of six members P, Q, R, S, T and U has three males and three females. There are two married couples and two unmarried siblings. U is P’s daughter and Q is R’s mother-in-law. T is an unmarried male and S is a male. Which one of the following is correct? [2020/19]
(a) R is U’s husband.
(b) R is S’s wife.
(c) S is unmarried.
(d) None of the above
Show Answer
Ans: (b) R is S’s wife.
6] A joint family consists of seven members A, B, C, D, E, F and G with three females. G is a widow and sister-in-law of D’s father F. B and D are siblings and A is daughter of B. C is cousin of B. Who is E?
1. Wife of F
2. Grandmother of A
3. Aunt of C
Select the correct answer using the code given below: [2019/71]
(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
Show Answer
Ans: (d) 1, 2 and 3
7] Consider the following:
A+ B means A is the son of B.
A – B means A is the wife of B.
What does the expression P + R- Q mean? [2017/19]
(a) Q is the son of P.
(b) Q is the wife of P.
(c) Q is the father of P.
(d) None of the above
Show Answer
Ans: (c) Q is the father of P.
8] Consider the following relationships among members of a family of six persons A, B, C, D, E and F:
1. The number of males equals that of females.
2. A and F are sons of F.
3. D is the mother of two, one boy and one girl.
4. B is the son of A.
5. There is only one married couple in the family at present.
Which one of the following inferences can be drawn from the above? [2017/55]
(a) A, B and C are all females.
(b) A is the husband of D.
(c) E and F are children of D.
(d) D is the daughter of F.
Show Answer
Ans: (b) A is the husband of D.
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