What will come in place of the question mark (?) in the following number series? 8, 10, 14, 20, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 8, 10, 14, 20, ?

A. 30

B. 26

C. 32

D. 28

Answer: Option D

Solution (By JKSSB Mock Tests)

The differences are: 2, 4, 6. These are increasing by 2. The next difference is 8. Therefore, 20+8=28.

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? 13, 26, 52, 104, ?

A. 234

B. 156

C. 208

D. 182

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Correct Answer: Option C

Explanation:
Each term is multiplied by 2. Therefore, 104×2=208.

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? 20, 25, 35, 50, ?

A. 60

B. 75

C. 70

D. 65

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Correct Answer: Option C

Explanation:
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

Question #3

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What will come in place of the question mark (?) in the following number series? 3, 11, 27, 59, 123, ?

A. 253

B. 249

C. 251

D. 247

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying by 2 and adding 5. (3×2)+5=11, (11×2)+5=27, (27×2)+5=59, (59×2)+5=123. The next term is (123×2)+5=251.

This question belongs to: Reasoning Number Series

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