What will come in place of the question mark (?) in the following number series? 2, 12, 36, 80, ? MCQ with Answer and Explanation

Question

Share Report Error

What will come in place of the question mark (?) in the following number series? 2, 12, 36, 80, ?

A. 180

B. 150

C. 160

D. 170

Answer: Option B

Solution (By JKSSB Mock Tests)

The pattern is: 1×2=2, 2×6=12, 3×12=36, 4×20=80. The multipliers are 2,6,12,20 which are n(n+1) for n=1,2,3,4. For n=5, 5×30=150.

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? 7, 13, 21, 31, ?

A. 42

B. 41

C. 43

D. 44

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option C

Explanation:
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

Question #2

Share Report

What will come in place of the question mark (?) in the following number series? 10, 17, 26, 37, 50, ?

A. 67

B. 63

C. 61

D. 65

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option D

Explanation:
The differences are: 7, 9, 11, 13. These are consecutive odd numbers. The next difference is 15. Therefore, 50+15=65.

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? 5, 9, 17, 33, ?

A. 65

B. 67

C. 69

D. 63

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option A

Explanation:
Each term is obtained by multiplying by 2 and subtracting 1. (5×2)-1=9, (9×2)-1=17, (17×2)-1=33. The next term is (33×2)-1=65.

This question belongs to: Reasoning Number Series

Explore All Number Series MCQs