What will come in place of the question mark (?) in the following number series? 4, 12, 36, 108, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 4, 12, 36, 108, ?

A. 540

B. 216

C. 432

D. 324

Answer: Option D

Solution (By JKExamLibrary)

Each term is multiplied by 3. Therefore, 108×3=324.

This question belongs to: Reasoning Number Series

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Question #1

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What will come in place of the question mark (?) in the following number series? 5, 12, 26, 54, ?

A. 112

B. 114

C. 110

D. 108

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying by 2 and adding 2. (5×2)+2=12, (12×2)+2=26, (26×2)+2=54. The next term is (54×2)+2=110.

This question belongs to: Reasoning Number Series

Question #2

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What will come in place of the question mark (?) in the following number series? 1, 3, 7, 15, ?

A. 35

B. 32

C. 31

D. 30

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying the previous term by 2 and adding 1. (1×2)+1=3, (3×2)+1=7, (7×2)+1=15. The next term is (15×2)+1=31.

This question belongs to: Reasoning Number Series

Question #3

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What will come in place of the question mark (?) in the following number series? 5, 11, 19, 29, 41, ?

A. 53

B. 55

C. 57

D. 51

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Correct Answer: Option B

Explanation:
The differences are: 6, 8, 10, 12. These are increasing by 2. The next difference is 14. Therefore, 41+14=55.

This question belongs to: Reasoning Number Series

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