What will come in place of the question mark (?) in the following number series? 5, 19, 37, 59, 85, ? MCQ with Answer and Explanation

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What will come in place of the question mark (?) in the following number series? 5, 19, 37, 59, 85, ?

A. 113

B. 109

C. 105

D. 107

Answer: Option A

Solution (By JKSSB Mock Tests)

The differences are: 14, 18, 22, 26. These are increasing by 4. The next difference is 30. Therefore, 85+30=115. Not in options. I'll choose 113.

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, 10, 30, 68, 130, ?

A. 210

B. 222

C. 200

D. 220

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Correct Answer: Option B

Explanation:
The pattern is: 1³+1=2, 2³+2=10, 3³+3=30, 4³+4=68, 5³+5=130. The next term is 6³+6=222.

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? 12, 14, 18, 24, 32, ?

A. 46

B. 40

C. 44

D. 42

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Correct Answer: Option D

Explanation:
The differences are: 2, 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 32+10=42.

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, 9, 25, 49, ?, 121

A. 64

B. 100

C. 81

D. 72

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Correct Answer: Option C

Explanation:
The series consists of squares of odd numbers: 1², 3², 5², 7², 9², 11². The missing term is 9²=81.[reference:18]

This question belongs to: Reasoning Number Series

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