If 3 is coded as 6, 4 as 12, 5 as 20, then 6 is coded as? MCQ with Answer and Explanation

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If 3 is coded as 6, 4 as 12, 5 as 20, then 6 is coded as?

A. 24

B. 30

C. 42

D. 36

Answer: Option B

Solution (By JKSSB Mock Tests)

The pattern is n×(n-1): 3×2=6, 4×3=12, 5×4=20, so 6×5=30.

This question belongs to: Reasoning Mental Reasoning

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Practice More Mental Reasoning Questions

Question #1

Find the missing term: 5, 7, 11, 19, 35, ?

A. 51

B. 65

C. 67

D. 60

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Correct Answer: Option C

Explanation:
Differences are +2, +4, +8, +16, each doubling; the next difference is +32, so 35+32=67.

This question belongs to: Reasoning Mental Reasoning

Question #2

In a certain code language, 'ok ta pe' means 'come and go', 'ta me pa' means 'go to school' and 'ok sa me' means 'come from school'. Which of the following means 'from' in that language?

A. sa

B. ta

C. ok

D. me

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Correct Answer: Option A

Explanation:
From first and third, 'ok' = come. From second and third, 'me' = school. Remaining in third is 'sa' = from.

This question belongs to: Reasoning Mental Reasoning

Question #3

Find the missing term: 1, 4, 10, 22, 46, ?

A. 90

B. 96

C. 94

D. 92

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Correct Answer: Option C

Explanation:
Each term is multiplied by 2 and 2 is added: 1×2+2=4, 4×2+2=10, 10×2+2=22, 22×2+2=46, so next is 46×2+2=94.

This question belongs to: Reasoning Mental Reasoning

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