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. 40

C. 38

D. 42

Answer: Option B

Solution (By JKExamLibrary)

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? 14, 21, 28, 35, ?

A. 41

B. 40

C. 45

D. 42

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Correct Answer: Option D

Explanation:
The series increases by 7 each time. Therefore, 35+7=42.

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? 7, 13, 25, 49, ?

A. 103

B. 97

C. 99

D. 101

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Correct Answer: Option B

Explanation:
Each term is obtained by multiplying by 2 and subtracting 1. (7×2)-1=13, (13×2)-1=25, (25×2)-1=49. The next term is (49×2)-1=97.

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? 4, 11, 21, 34, ?

A. 49

B. 50

C. 48

D. 47

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Correct Answer: Option B

Explanation:
The differences are: 7, 10, 13. These are increasing by 3. The next difference is 16. Therefore, 34+16=50.

This question belongs to: Reasoning Number Series

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