What will come in place of the question mark (?) in the following number series? 3, 4, 7, 11, 18, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 3, 4, 7, 11, 18, ?

A. 31

B. 27

C. 33

D. 29

Answer: Option D

Solution (By JKExamLibrary)

This is a Fibonacci-like series where each term is the sum of the previous two terms. 7+11=18, 11+18=29. The next term is 29.

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? 11, 13, 17, 19, 23, ?

A. 25

B. 29

C. 27

D. 31

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Correct Answer: Option B

Explanation:
The series consists of consecutive prime numbers. The next prime number after 23 is 29.

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? 6, 13, 24, 39, ?

A. 54

B. 56

C. 60

D. 58

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Correct Answer: Option D

Explanation:
The differences are: 7, 11, 15. These are increasing by 4. The next difference is 19. Therefore, 39+19=58.

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? 1, 2, 6, 24, 120, ?

A. 480

B. 720

C. 840

D. 600

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Correct Answer: Option B

Explanation:
The pattern is: 1×1=1, 1×2=2, 2×3=6, 6×4=24, 24×5=120. The next term is 120×6=720.

This question belongs to: Reasoning Number Series

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