Find the odd one out: 10, 20, 30, 45, 50 MCQ with Answer and Explanation

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Find the odd one out: 10, 20, 30, 45, 50

A. 45

B. 50

C. 20

D. 30

Answer: Option A

Solution (By JKSSB Mock Tests)

All others are exact multiples of 10; 45 is not divisible by 10.

This question belongs to: Reasoning Mental Reasoning

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Practice More Mental Reasoning Questions

Question #1

Find the missing term: 8, 27, 64, 125, ?

A. 216

B. 226

C. 196

D. 206

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Correct Answer: Option A

Explanation:
The terms are cubes: 2³=8, 3³=27, 4³=64, 5³=125, so next is 6³=216.

This question belongs to: Reasoning Mental Reasoning

Question #2

6 : 222 :: 8 : ?

A. 528

B. 510

C. 520

D. 512

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Correct Answer: Option C

Explanation:
The relation is n^3 + n. 6^3 + 6 = 216 + 6 = 222; 8^3 + 8 = 512 + 8 = 520.

This question belongs to: Reasoning Mental Reasoning

Question #3

Find the missing term: 3, 6, 9, 12, 15, ?

A. 20

B. 21

C. 18

D. 16

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Correct Answer: Option C

Explanation:
The terms increase by 3 each time: 15+3=18.

This question belongs to: Reasoning Mental Reasoning

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