What will come in place of the question mark (?) in the following number series? 2, 8, 32, 128, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 2, 8, 32, 128, ?

A. 640

B. 256

C. 512

D. 384

Answer: Option C

Solution (By JKSSB Mock Tests)

Each term is multiplied by 4. Therefore, 128×4=512.

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? 10, 30, 60, 100, 150, ?

A. 210

B. 200

C. 180

D. 220

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Correct Answer: Option A

Explanation:
The differences are: 20, 30, 40, 50. These are increasing by 10. The next difference is 60. Therefore, 150+60=210.

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? 8, 13, 21, 34, ?

A. 49

B. 55

C. 45

D. 47

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Correct Answer: Option B

Explanation:
This is a Fibonacci-like series where each term is the sum of the previous two terms. 8+13=21, 13+21=34, 21+34=55.

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? 8, 22, 40, 62, 88, ?

A. 108

B. 114

C. 110

D. 118

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Correct Answer: Option D

Explanation:
The differences are: 14, 18, 22, 26. These are increasing by 4. The next difference is 30. Therefore, 88+30=118.

This question belongs to: Reasoning Number Series

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