What will come in place of the question mark (?) in the following number series? 8, 24, 48, 80, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 8, 24, 48, 80, ?

A. 128

B. 112

C. 100

D. 120

Answer: Option D

Solution (By JKSSB Mock Tests)

The differences are: 16, 24, 32. These are increasing by 8. The next difference is 40. Therefore, 80+40=120.

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, 9, 28, 65, 126, ?

A. 219

B. 215

C. 221

D. 217

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Correct Answer: Option D

Explanation:
The pattern is: 1³+1=2, 2³+1=9, 3³+1=28, 4³+1=65, 5³+1=126. The next term is 6³+1=217.

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? 3, 5, 9, 17, ?

A. 35

B. 29

C. 33

D. 31

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying by 2 and subtracting 1. (3×2)-1=5, (5×2)-1=9, (9×2)-1=17. The next term is (17×2)-1=33.

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? 10, 14, 22, 34, ?

A. 50

B. 48

C. 52

D. 46

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Correct Answer: Option A

Explanation:
The differences are: 4, 8, 12. These are increasing by 4. The next difference is 16. Therefore, 34+16=50.

This question belongs to: Reasoning Number Series

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