Find the odd one out: 8, 27, 64, 100, 125, 216, 343 MCQ with Answer and Explanation

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Find the odd one out: 8, 27, 64, 100, 125, 216, 343

A. 343

B. 125

C. 27

D. 100

Answer: Option D

Solution (By JKSSB Mock Tests)

All others are cubes (2³,3³,4³,5³,6³,7³) while 100 is not a cube.

This question belongs to: Reasoning Mental Reasoning

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Practice More Mental Reasoning Questions

Question #1

Find the missing term in the series: 2, 6, 12, 20, 30, ?

A. 42

B. 40

C. 46

D. 44

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Correct Answer: Option A

Explanation:
The pattern is n(n+1): 1×2=2, 2×3=6, 3×4=12, 4×5=20, 5×6=30, so the next term is 6×7=42.

This question belongs to: Reasoning Mental Reasoning

Question #2

Find the missing term: 1, 3, 7, 15, 31, ?

A. 62

B. 63

C. 64

D. 65

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Correct Answer: Option B

Explanation:
Each term is double plus 1: 1×2+1=3, 3×2+1=7, 7×2+1=15, 15×2+1=31, so next is 31×2+1=63.

This question belongs to: Reasoning Mental Reasoning

Question #3

Find the odd one out: 3, 5, 7, 12, 17, 19

A. 12

B. 7

C. 19

D. 17

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Correct Answer: Option A

Explanation:
All others are prime numbers while 12 is not.

This question belongs to: Reasoning Mental Reasoning

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