If 2 is coded as 4, 3 as 9, 4 as 16, then 7 is coded as? MCQ with Answer and Explanation

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If 2 is coded as 4, 3 as 9, 4 as 16, then 7 is coded as?

A. 49

B. 42

C. 36

D. 56

Answer: Option A

Solution (By JKSSB Mock Tests)

The code is n²: 2²=4, 3²=9, 4²=16, so 7²=49.

This question belongs to: Reasoning Mental Reasoning

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Practice More Mental Reasoning Questions

Question #1

Find the odd one out: 2, 4, 6, 8, 10

A. 10

B. 6

C. 4

D. 2

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Correct Answer: Option D

Explanation:
All except 2 are composite even numbers; 2 is the only prime even number in the list.

This question belongs to: Reasoning Mental Reasoning

Question #2

Find the missing term: 2, 4, 8, 16, 32, ?

A. 72

B. 56

C. 48

D. 64

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Correct Answer: Option D

Explanation:
Each term is double the previous term: 32×2=64.

This question belongs to: Reasoning Mental Reasoning

Question #3

Find the missing term: 4, 12, 28, 60, ?

A. 116

B. 112

C. 120

D. 124

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Correct Answer: Option D

Explanation:
Each term is multiplied by 2 and 4 added: 4×2+4=12, 12×2+4=28, 28×2+4=60, so 60×2+4=124.

This question belongs to: Reasoning Mental Reasoning

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