What will come in place of the question mark (?) in the following number series? 7, 10, 15, 22, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 7, 10, 15, 22, ?

A. 35

B. 33

C. 31

D. 29

Answer: Option C

Solution (By JKExamLibrary)

The differences are: 3, 5, 7. These are consecutive odd numbers. The next difference is 9. Therefore, 22+9=31.

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? 2, 4, 8, 14, 22, 32, ?

A. 42

B. 44

C. 40

D. 46

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Correct Answer: Option B

Explanation:
The differences are: 2, 4, 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 32+12=44.

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? 3, 15, 35, 63, ?

A. 100

B. 120

C. 80

D. 99

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Correct Answer: Option D

Explanation:
The pattern is: 1×3=3, 3×5=15, 5×7=35, 7×9=63. The next term is 9×11=99.

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? 7, 10, 15, 22, 31, ?

A. 40

B. 42

C. 38

D. 44

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Correct Answer: Option B

Explanation:
The differences are: 3, 5, 7, 9. These are consecutive odd numbers. The next difference is 11. Therefore, 31+11=42.

This question belongs to: Reasoning Number Series

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