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. 720

B. 960

C. 810

D. 540

Answer: Option C

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? 5, 11, 19, 29, 41, ?

A. 55

B. 57

C. 53

D. 51

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Correct Answer: Option A

Explanation:
The differences are: 6, 8, 10, 12. These are increasing by 2. The next difference is 14. Therefore, 41+14=55.

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? 4, 10, 18, 28, ?

A. 38

B. 36

C. 40

D. 42

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Correct Answer: Option C

Explanation:
The differences are: 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 28+12=40.

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. 24

B. 30

C. 25

D. 22

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Correct Answer: Option C

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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