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. 60

C. 75

D. 65

Answer: Option A

Solution (By JKSSB Mock Tests)

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? 5, 11, 21, 35, ?

A. 51

B. 49

C. 47

D. 53

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Correct Answer: Option D

Explanation:
The differences are: 6, 10, 14. These are increasing by 4. The next difference is 18. Therefore, 35+18=53.

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, 9, 28, 65, ?

A. 126

B. 127

C. 124

D. 125

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Correct Answer: Option A

Explanation:
The pattern is: 1³+1=2, 2³+1=9, 3³+1=28, 4³+1=65. The next term is 5³+1=126.[reference:8]

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? 1, 2, 6, 24, ?

A. 100

B. 60

C. 80

D. 120

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Correct Answer: Option D

Explanation:
The pattern is: 1×1=1, 1×2=2, 2×3=6, 6×4=24. The next term is 24×5=120.

This question belongs to: Reasoning Number Series

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