What will come in place of the question mark (?) in the following number series? 1, 6, 15, 28, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 1, 6, 15, 28, ?

A. 40

B. 45

C. 42

D. 48

Answer: Option B

Solution (By JKSSB Mock Tests)

The pattern is: 1×1=1, 2×3=6, 3×5=15, 4×7=28. The next term is 5×9=45.

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, 14, 28, 46, 68, ?

A. 88

B. 90

C. 92

D. 94

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Correct Answer: Option C

Explanation:
The differences are: 10, 14, 18, 22. These are increasing by 4. The next difference is 26. Therefore, 68+26=94.

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? 5, 12, 20, 29, ?

A. 37

B. 40

C. 39

D. 38

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Correct Answer: Option C

Explanation:
The differences are: 7, 8, 9. The next difference is 10. Therefore, 29+10=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? 2, 16, 34, 56, 82, ?

A. 106

B. 110

C. 102

D. 104

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Correct Answer: Option B

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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