What will come in place of the question mark (?) in the following number series? 6, 15, 28, 45, ? MCQ with Answer and Explanation

Question

Share Report Error

What will come in place of the question mark (?) in the following number series? 6, 15, 28, 45, ?

A. 66

B. 62

C. 60

D. 64

Answer: Option A

Solution (By JKExamLibrary)

The differences are: 9, 13, 17. These are increasing by 4. The next difference is 21. Therefore, 45+21=66.

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? 4, 6, 12, 14, 28, 30, ?

A. 62

B. 64

C. 32

D. 60

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option D

Explanation:
The pattern alternates: +2, ×2, +2, ×2, +2, ×2. The last operation is ×2. Therefore, 30×2=60.[reference:14]

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? 2, 9, 28, 65, ?

A. 126

B. 125

C. 127

D. 124

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option A

Explanation:
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

Question #3

Share Report

What will come in place of the question mark (?) in the following number series? 1, 3, 7, 15, ?

A. 30

B. 35

C. 31

D. 32

View Answer & Solution Discuss

Get Complete Subject PDF for Reasoning

Correct Answer: Option C

Explanation:
Each term is obtained by multiplying the previous term by 2 and adding 1. (1×2)+1=3, (3×2)+1=7, (7×2)+1=15. The next term is (15×2)+1=31.

This question belongs to: Reasoning Number Series

Explore All Number Series MCQs