What will come in place of the question mark (?) in the following number series? 20, 25, 35, 50, ? MCQ with Answer and Explanation

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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. 60

D. 65

Answer: Option A

Solution (By JKExamLibrary)

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

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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, 6, 10, 14, 18, ?

A. 24

B. 20

C. 22

D. 26

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Correct Answer: Option C

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

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, 12, 19, 28, ?

A. 41

B. 39

C. 37

D. 35

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Correct Answer: Option B

Explanation:
The differences are: 5, 7, 9. These are consecutive odd numbers. The next difference is 11. Therefore, 28+11=39.

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? 3, 15, 35, 63, ?

A. 120

B. 80

C. 100

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

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