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 next number: 4, 5, 12, 39, 160, ?

A. 820

B. 805

C. 815

D. 810

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Correct Answer: Option B

Explanation:
Pattern: ×1+1, ×2+2, ×3+3, ×4+4, ×5+5: 4×1+1=5, 5×2+2=12, 12×3+3=39, 39×4+4=160, 160×5+5=805.

This question belongs to: Reasoning Mental Reasoning

Question #2

In a code, CRICKET is coded as DSJDLFU. How is HOCKEY coded?

A. IPDLFY

B. IPDLFZ

C. IQDLFZ

D. IPEKFZ

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Correct Answer: Option B

Explanation:
Each letter is shifted 1 place forward. H+1=I, O+1=P, C+1=D, K+1=L, E+1=F, Y+1=Z.

This question belongs to: Reasoning Mental Reasoning

Question #3

A man walks 5 km toward south and then turns to the right. After walking 3 km he turns to the left and walks 5 km. Now in which direction is he from the starting place?

A. North-East

B. South-West

C. West

D. South

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Correct Answer: Option B

Explanation:
Start facing South 5 km, turn right (West) 3 km, turn left (South) 5 km. Final position is 10 km South and 3 km West of start, i.e., South-West.

This question belongs to: Reasoning Mental Reasoning

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