What will come in place of the question mark (?) in the following number series? 5, 10, 15, 20, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 5, 10, 15, 20, ?

A. 30

B. 22

C. 25

D. 24

Answer: Option C

Solution (By JKSSB Mock Tests)

The series is increasing by 5 each time. Therefore, the next term is 20+5=25.[reference:7]

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? 4, 14, 28, 46, 68, ?

A. 88

B. 90

C. 94

D. 92

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Correct Answer: Option D

Explanation:
The differences are: 10, 14, 18, 22. These are increasing by 4. The next difference is 26. Therefore, 68+26=94.

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? 2, 6, 10, 14, 18, ?

A. 24

B. 26

C. 20

D. 22

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Correct Answer: Option D

Explanation:
The series increases by 4 each time. Therefore, 18+4=22.

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, 13, 25, 41, 61, ?

A. 87

B. 85

C. 83

D. 81

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Correct Answer: Option B

Explanation:
The differences are: 8, 12, 16, 20. These are increasing by 4. The next difference is 24. Therefore, 61+24=85.

This question belongs to: Reasoning Number Series

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