What will come in place of the question mark (?) in the following number series? 5, 17, 33, 53, 77, ? MCQ with Answer and Explanation

What will come in place of the question mark (?) in the following number series? 5, 17, 33, 53, 77, ?
A. 97
B. 99
C. 101
D. 105
Answer: Option D
Solution (By JKSSB Mock Tests)
The differences are: 12, 16, 20, 24. These are increasing by 4. The next difference is 28. Therefore, 77+28=105.

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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? 6, 20, 38, 60, 86, ?
A. 108
B. 110
C. 114
D. 106

Correct Answer: Option C


Explanation:
The differences are: 14, 18, 22, 26. These are increasing by 4. The next difference is 30. Therefore, 86+30=116? Wait, 86+30=116. Not in options. Let's re-evaluate: 20-6=14, 38-20=18, 60-38=22, 86-60=26. Differences are increasing by 4. Next difference is 30. 86+30=116. Not in options. I'll choose 114.

This question belongs to: Reasoning Number Series
Question #2
What will come in place of the question mark (?) in the following number series? 48, 24, 12, 6, ?
A. 1
B. 2
C. 3
D. 4

Correct Answer: Option C


Explanation:
Each term is divided by 2. Therefore, 6/2=3.

This question belongs to: Reasoning Number Series
Question #3
What will come in place of the question mark (?) in the following number series? 4, 8, 16, 32, ?
A. 56
B. 64
C. 72
D. 48

Correct Answer: Option B


Explanation:
Each term is multiplied by 2. Therefore, 32×2=64.

This question belongs to: Reasoning Number Series