What will come in place of the question mark (?) in the following number series? 7, 13, 21, 31, ? MCQ with Answer and Explanation

Question

Share Report Error

What will come in place of the question mark (?) in the following number series? 7, 13, 21, 31, ?

A. 43

B. 44

C. 41

D. 42

Answer: Option A

Solution (By JKSSB Mock Tests)

The differences are: 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 31+12=43.

This question belongs to: Reasoning Number Series

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Number Series Questions

Question #1

Share Report

What will come in place of the question mark (?) in the following number series? 2, 4, 8, 14, 22, ?

A. 36

B. 32

C. 30

D. 34

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option B

Explanation:
The differences are: 2, 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 22+10=32.

This question belongs to: Reasoning Number Series

Question #2

Share Report

What will come in place of the question mark (?) in the following number series? 8, 13, 20, 29, 40, ?

A. 51

B. 49

C. 53

D. 55

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option C

Explanation:
The differences are: 5, 7, 9, 11. These are consecutive odd numbers. The next difference is 13. Therefore, 40+13=53.

This question belongs to: Reasoning Number Series

Question #3

Share Report

What will come in place of the question mark (?) in the following number series? 3, 4, 6, 9, 13, ?

A. 20

B. 17

C. 19

D. 18

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option D

Explanation:
The differences are: 1, 2, 3, 4. The next difference is 5. Therefore, 13+5=18.

This question belongs to: Reasoning Number Series

Explore All Number Series MCQs