If 5 is coded as 25, 6 as 36, 7 as 49, then 8 is coded as? MCQ with Answer and Explanation

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If 5 is coded as 25, 6 as 36, 7 as 49, then 8 is coded as?

A. 81

B. 72

C. 64

D. 56

Answer: Option C

Solution (By JKSSB Mock Tests)

The code is n²: 5²=25, 6²=36, 7²=49, so 8²=64.

This question belongs to: Reasoning Mental Reasoning

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Question #1

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A person walks 10 km towards North. From there he walks 6 km towards South. Then he walks 3 km towards East. How far and in which direction is he with reference to his starting point?

A. 5 km North-East

B. 5 km East

C. 7 km East

D. 7 km North-East

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Correct Answer: Option A

Explanation:
Net North =10-6=4 km North, 3 km East. Distance √(4²+3²)=5 km North-East.

This question belongs to: Reasoning Mental Reasoning

Question #2

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If A + B means A is father of B and A × B means A is brother of B, then P + Q × R means:

A. P is father of R

B. P is uncle of R

C. P is grandfather of R

D. P is brother of R

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Correct Answer: Option A

Explanation:
P + Q means P is father of Q. Q × R means Q is brother of R. So P is also father of R.

This question belongs to: Reasoning Mental Reasoning

Question #3

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Find the odd one out: 3, 7, 11, 15, 19

A. 11

B. 7

C. 19

D. 15

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Correct Answer: Option D

Explanation:
All others are prime numbers; 15 is composite.

This question belongs to: Reasoning Mental Reasoning

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