7 : 56 :: 9 : ? MCQ with Answer and Explanation

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7 : 56 :: 9 : ?

A. 81

B. 88

C. 90

D. 72

Answer: Option C

Solution (By JKSSB Mock Tests)

The relation is n(n+1). 7 × 8 = 56; 9 × 10 = 90.

This question belongs to: Reasoning Mental Reasoning

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Question #1

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A is father of B. B is sister of C. C is son of D. How is D related to A?

A. Sister

B. Daughter

C. Mother

D. Wife

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Correct Answer: Option D

Explanation:
D is the mother of B and C. A is father of B. Therefore D is the wife of A.

This question belongs to: Reasoning Mental Reasoning

Question #2

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Find the missing term: 11, 13, 17, 19, 23, ?

A. 25

B. 29

C. 31

D. 27

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Correct Answer: Option B

Explanation:
These are consecutive prime numbers after 11: 11, 13, 17, 19, 23, and the next prime is 29.

This question belongs to: Reasoning Mental Reasoning

Question #3

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A, B, C, D and E are five friends. A is shorter than B but taller than E. C is the tallest. D is shorter than B but taller than A. Who is the second tallest?

A. B

B. D

C. A

D. E

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Correct Answer: Option A

Explanation:
C tallest. Then B > D > A > E. So second tallest is B.

This question belongs to: Reasoning Mental Reasoning

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