Find the odd one out: 121, 144, 169, 196, 225, 256 MCQ with Answer and Explanation

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Find the odd one out: 121, 144, 169, 196, 225, 256

A. 196

B. None of these

C. 121

D. 169

Answer: Option B

Solution (By JKSSB Mock Tests)

All are perfect squares: 11²,12²,13²,14²,15²,16². No odd one.

This question belongs to: Reasoning Mental Reasoning

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Practice More Mental Reasoning Questions

Question #1

7 : 56 :: 9 : ?

A. 88

B. 72

C. 81

D. 90

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Correct Answer: Option D

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

This question belongs to: Reasoning Mental Reasoning

Question #2

A, B, C, D, E, F and G are sitting in a row facing North. C is to the immediate right of D. F is fourth to the left of G. B is between A and F. E is between C and G. Who is sitting in the middle?

A. E

B. D

C. B

D. C

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Correct Answer: Option A

Explanation:
From clues: possible arrangement A B F D C E G or similar. Middle is 4th position. One valid is A B F D C E G → D in middle.

This question belongs to: Reasoning Mental Reasoning

Question #3

Find the missing term: 1, 3, 6, 10, 15, ?

A. 21

B. 18

C. 19

D. 20

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Correct Answer: Option A

Explanation:
Triangular numbers: n(n+1)/2. 1, 3, 6, 10, 15 correspond to n=1 to 5, so next is 6×7/2=21.

This question belongs to: Reasoning Mental Reasoning

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