What will come in place of the question mark (?) in the following number series? 8, 13, 21, 34, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 8, 13, 21, 34, ?

A. 47

B. 55

C. 49

D. 45

Answer: Option B

Solution (By JKExamLibrary)

This is a Fibonacci-like series where each term is the sum of the previous two terms. 8+13=21, 13+21=34, 21+34=55.

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? 41, 43, 47, 53, 59, ?

A. 64

B. 65

C. 67

D. 61

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Correct Answer: Option D

Explanation:
The series consists of consecutive prime numbers. The prime number immediately following 59 is 61.[reference:4]

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, 8, 27, 64, 125, ?

A. 144

B. 216

C. 169

D. 196

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Correct Answer: Option B

Explanation:
The series consists of cubes of consecutive integers: 1³, 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? 4, 10, 18, 28, ?

A. 40

B. 36

C. 38

D. 42

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Correct Answer: Option A

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

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