Find the odd one out: 2, 3, 5, 7, 9 MCQ with Answer and Explanation

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Find the odd one out: 2, 3, 5, 7, 9

A. 9

B. 7

C. 2

D. 3

Answer: Option A

Solution (By JKSSB Mock Tests)

9 is composite, while 2, 3, 5 and 7 are prime numbers.

This question belongs to: Reasoning Mental Reasoning

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Question #1

36 : 9 :: 64 : ?

A. 32

B. 8

C. 24

D. 16

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Correct Answer: Option D

Explanation:
The relation is number ÷ 4. 36 ÷ 4 = 9; 64 ÷ 4 = 16.

This question belongs to: Reasoning Mental Reasoning

Question #2

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

A. 20

B. 50

C. 45

D. 30

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Correct Answer: Option C

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

This question belongs to: Reasoning Mental Reasoning

Question #3

Find the missing term: 2, 5, 14, 41, ?

A. 126

B. 122

C. 124

D. 120

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Correct Answer: Option B

Explanation:
Each term is multiplied by 3 and 1 is subtracted: 2×3-1=5, 5×3-1=14, 14×3-1=41, so 41×3-1=122.

This question belongs to: Reasoning Mental Reasoning

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