What will come in place of the question mark (?) in the following number series? 20, 10, 5, 2.5, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 20, 10, 5, 2.5, ?

A. 0.75

B. 2

C. 1.5

D. 1.25

Answer: Option D

Solution (By JKExamLibrary)

Each term is divided by 2. Therefore, 2.5/2=1.25.

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? 9, 10, 12, 15, 19, ?

A. 25

B. 22

C. 24

D. 23

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Correct Answer: Option C

Explanation:
The differences are: 1, 2, 3, 4. The next difference is 5. Therefore, 19+5=24.

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? 20, 25, 35, 50, ?

A. 70

B. 75

C. 65

D. 60

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Correct Answer: Option A

Explanation:
The differences are: 5, 10, 15. These are increasing by 5. The next difference is 20. Therefore, 50+20=70.

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? 12, 18, 26, 36, ?

A. 44

B. 46

C. 50

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

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