What will come in place of the question mark (?) in the following number series? 2, 9, 28, 65, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 2, 9, 28, 65, ?

A. 125

B. 126

C. 124

D. 127

Answer: Option B

Solution (By JKSSB Mock Tests)

The pattern is: 1³+1=2, 2³+1=9, 3³+1=28, 4³+1=65. The next term is 5³+1=126.[reference:8]

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, 6, 14, 30, 62, ?

A. 126

B. 120

C. 122

D. 118

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Correct Answer: Option A

Explanation:
Each term is obtained by multiplying by 2 and adding 2. (2×2)+2=6, (6×2)+2=14, (14×2)+2=30, (30×2)+2=62. The next term is (62×2)+2=126.

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? 7, 12, 19, 28, ?

A. 41

B. 39

C. 35

D. 37

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Correct Answer: Option B

Explanation:
The differences are: 5, 7, 9. These are consecutive odd numbers. The next difference is 11. Therefore, 28+11=39.

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? 50, 49, 47, 44, ?

A. 40

B. 43

C. 42

D. 41

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Correct Answer: Option A

Explanation:
The differences are: -1, -2, -3. The next difference is -4. Therefore, 44-4=40.

This question belongs to: Reasoning Number Series

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