What will come in place of the question mark (?) in the following number series? 9, 10, 12, 15, 19, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 9, 10, 12, 15, 19, ?

A. 24

B. 25

C. 22

D. 23

Answer: Option A

Solution (By JKExamLibrary)

The differences are: 1, 2, 3, 4. The next difference is 5. Therefore, 19+5=24.

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, 14, 30, 50, 74, ?

A. 102

B. 98

C. 94

D. 96

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Correct Answer: Option A

Explanation:
The differences are: 12, 16, 20, 24. These are increasing by 4. The next difference is 28. Therefore, 74+28=102.

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? 8, 27, 64, 125, ?

A. 256

B. 144

C. 216

D. 196

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Correct Answer: Option C

Explanation:
The series consists of cubes of consecutive integers starting from 2: 2³, 3³, 4³, 5³. The next term is 6³=216.

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? 6, 18, 54, 162, ?

A. 486

B. 324

C. 810

D. 648

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Correct Answer: Option A

Explanation:
Each term is multiplied by 3. Therefore, 162×3=486.

This question belongs to: Reasoning Number Series

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