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. 25

B. 24

C. 30

D. 22

Answer: Option A

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? 12, 18, 26, 36, ?

A. 50

B. 44

C. 46

D. 48

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Correct Answer: Option D

Explanation:
The differences are: 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 36+12=48.

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? 4, 8, 14, 22, ?

A. 28

B. 34

C. 32

D. 30

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Correct Answer: Option C

Explanation:
The differences are: 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 22+10=32.

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? 11, 22, 55, 165, ?

A. 495.5

B. 325.5

C. 577.5

D. 333.5

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Correct Answer: Option C

Explanation:
The pattern is: 11×2=22, 22×2.5=55, 55×3=165. The multiplier increases by 0.5 each time. The next multiplier is 3.5. Therefore, 165×3.5=577.5.[reference:11]

This question belongs to: Reasoning Number Series

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