What will come in place of the question mark (?) in the following number series? 10, 30, 90, 270, ? 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, 90, 270, ?

A. 810

B. 720

C. 540

D. 960

Answer: Option A

Solution (By JKSSB Mock Tests)

Each term is multiplied by 3. Therefore, 270×3=810.

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, 11, 28, 53, ?

A. 86

B. 88

C. 84

D. 82

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Correct Answer: Option A

Explanation:
The differences are: 9, 17, 25. These are increasing by 8. The next difference is 33. Therefore, 53+33=86.

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? 1, 10, 100, ?

A. 1000

B. 2000

C. 500

D. 10000

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Correct Answer: Option A

Explanation:
Each term is multiplied by 10. Therefore, 100×10=1000.

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? 5, 10, 15, 20, ?

A. 30

B. 25

C. 22

D. 24

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Correct Answer: Option B

Explanation:
The series is increasing by 5 each time. Therefore, the next term is 20+5=25.[reference:7]

This question belongs to: Reasoning Number Series

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