Logical Reasoning (Blood Relation) Practice Test – 1

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Question 1:

Introducing a boy, a girl said, “He is the son of the daughter of the father of my uncle.” How is the boy related to the girl?

a) Brother

b) Nephew

c) Uncle

d) Son-in-law

Answer: Option A

Explanation:

The father of the boy’s uncle → the grandfather of the boy and daughter of the grandfather → sister of father.

Question 2 :

Each of these questions is based on the following information:

  1. A + B means A is the mother of B.
  2. A – B means A is the sister of B.
  3. A * B means A is the father of B.
  4. A β B means A is the brother of B.

If A + B means A is the brother of B; A – B means A is the sister of B and A x B means A is the father of B. Which of the following means that C is the son of M?

a) M – N x C + F

b) F – C + N x M

c) N + M – F x C

d) M x N – C + F

Answer: Option D

Explanation:

M x N → M is the father of N

N – C → N is the sister of C

and C + F → C is the brother of F.

Hence, M is the father of C or C is the son of M.

Question 3 :

If P + Q means P is the brother of Q; P x Q means P is the father of Q and P – Q means P is the sister of Q, which of the following relations shows that I is the niece of K?a) K + Y + Z – I

b) K + Y x I – Z

c) Z – I x Y + K

d) K x Y + I – Z

Answer: Option B

Explanation:

K + Y → K is the brother of Y

Y x I → Y is the father of I

Hence, → K is the uncle of I

and I – Z → I is the sister of Z

Hence, → I is the niece of K.

Question 4 :

If A $ B means A is the brother of B; A @ B means A is the wife of B; A # B means A is the daughter of B and A * B means A is the father of B, which of the following indicates that U is the father-in-law of P?

a) P @ Q $ T # U * W

b) P @ W $ Q * T # U

c) P @ Q $ W * T # U

d) P @ Q $ T # W * U

Answer: Option A

Explanation:

P @ Q → P is the wife of Q …(1)

Q $ T → Q is the brother of T …(2)

T # U → T is the daughter of U

Hence, → Q is the son of U …(3)

U * W → U is the father of W.

From (1) and (3), U is the father-in-law of P.

Question 5 :

A . B5D means B is the father of D.

B. B9D means B is the sister of D.

C. B4D means B is the brother of D.

D. B3D means B is the wife of D.

Which of the following means F is the mother of K?

a) F3M5K

b) F5M3K

c) F9M4N3K

d) F3M5N3K

Answer: Option A

Explanation:

F3M → F is the wife of M

M5K → M is the father of K

Therefore, F is the mother of K.

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