What will come in place of the question mark (?) in the following number series? 10, 30, 60, 100, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 10, 30, 60, 100, ?

A. 140

B. 160

C. 120

D. 150

Answer: Option D

Solution (By JKSSB Mock Tests)

The differences are: 20, 30, 40. These are increasing by 10. The next difference is 50. Therefore, 100+50=150.

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, 10, 30, 68, ?

A. 130

B. 120

C. 140

D. 150

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Correct Answer: Option A

Explanation:
The pattern is: 1³+1=2, 2³+2=10, 3³+3=30, 4³+4=68. The next term is 5³+5=130.

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? 48, 24, 12, 6, ?

A. 1

B. 2

C. 4

D. 3

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Correct Answer: Option D

Explanation:
Each term is divided by 2. Therefore, 6/2=3.

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? 7, 12, 19, 28, ?

A. 39

B. 41

C. 37

D. 35

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Correct Answer: Option A

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

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