What will come in place of the question mark (?) in the following number series? 5, 12, 26, 54, ? MCQ with Answer and Explanation

What will come in place of the question mark (?) in the following number series? 5, 12, 26, 54, ?
A. 112
B. 114
C. 110
D. 108
Answer: Option C
Solution (By JKExamLibrary)
Each term is obtained by multiplying by 2 and adding 2. (5×2)+2=12, (12×2)+2=26, (26×2)+2=54. The next term is (54×2)+2=110.

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Practice More Number Series Questions

Question #1
What will come in place of the question mark (?) in the following number series? 4, 8, 12, 20, ?
A. 28
B. 36
C. 24
D. 32

Correct Answer: Option D


Explanation:
The pattern alternates: +4, ×2? No, 4+4=8, 8+4=12, 12+8=20. Actually, it's adding consecutive even numbers: +4, +4, +8. But more precisely: 4+4=8, 8+4=12, 12+8=20, 20+12=32? Let's re-evaluate: The differences are 4, 4, 8, 12. Not a clear pattern. A better pattern: each term is the sum of the previous two terms? 4+8=12, 8+12=20, 12+20=32. Yes, this is a Fibonacci-like series. The next term is 12+20=32.

This question belongs to: Reasoning Number Series
Question #2
What will come in place of the question mark (?) in the following number series? 4, 6, 10, 16, 24, ?
A. 34
B. 30
C. 32
D. 36

Correct Answer: Option A


Explanation:
The differences are: 2, 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 24+10=34.

This question belongs to: Reasoning Number Series
Question #3
What will come in place of the question mark (?) in the following number series? 1, 4, 9, 16, 25, ?
A. 36
B. 35
C. 49
D. 30

Correct Answer: Option A


Explanation:
The series consists of squares of consecutive integers: 1², 2², 3², 4², 5². The next term is 6²=36.

This question belongs to: Reasoning Number Series