What will come in place of the question mark (?) in the following number series? 4, 10, 18, 28, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 4, 10, 18, 28, ?

A. 36

B. 38

C. 42

D. 40

Answer: Option D

Solution (By JKSSB Mock Tests)

The differences are: 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 28+12=40.

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? 3, 10, 20, 33, 49, 68, ?

A. 91

B. 90

C. 75

D. 85

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Correct Answer: Option B

Explanation:
The differences are: 7, 10, 13, 16, 19 (increasing by 3). The next difference is 22. Therefore, 68+22=90.[reference:17]

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? 10, 14, 22, 34, ?

A. 46

B. 48

C. 50

D. 52

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Correct Answer: Option C

Explanation:
The differences are: 4, 8, 12. These are increasing by 4. The next difference is 16. Therefore, 34+16=50.

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? 2, 8, 32, 128, ?

A. 640

B. 384

C. 256

D. 512

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Correct Answer: Option D

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

This question belongs to: Reasoning Number Series

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