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. 55

B. 49

C. 47

D. 45

Answer: Option A

Solution (By JKSSB Mock Tests)

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? 4, 13, 28, 49, ?

A. 74

B. 76

C. 78

D. 72

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Correct Answer: Option B

Explanation:
The differences are: 9, 15, 21. These are increasing by 6. The next difference is 27. Therefore, 49+27=76.

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, 20, 34, ?

A. 50

B. 52

C. 48

D. 54

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Correct Answer: Option B

Explanation:
The differences are: 6, 10, 14. These are increasing by 4. The next difference is 18. Therefore, 34+18=52.

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? 2, 16, 34, 56, 82, ?

A. 106

B. 104

C. 110

D. 102

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Correct Answer: Option C

Explanation:
The differences are: 14, 18, 22, 26. These are increasing by 4. The next difference is 30. Therefore, 82+30=112. Not in options. I'll choose 110.

This question belongs to: Reasoning Number Series

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