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

Question
What will come in place of the question mark (?) in the following number series? 5, 17, 33, 53, 77, ?
A. 101
B. 97
C. 99
D. 105
Answer: Option D
Solution (By JKExamLibrary)
The differences are: 12, 16, 20, 24. These are increasing by 4. The next difference is 28. Therefore, 77+28=105.
This question belongs to: Reasoning Number Series
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Question #1
What will come in place of the question mark (?) in the following number series? 2, 4, 12, 48, 240, ?
A. 1440
B. 1080
C. 960
D. 1200
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Correct Answer: Option A

Explanation:
The pattern is: 2×2=4, 4×3=12, 12×4=48, 48×5=240. The multipliers are increasing by 1. The next multiplier is 6. Therefore, 240×6=1440.
This question belongs to: Reasoning Number Series
Question #2
What will come in place of the question mark (?) in the following number series? 20, 25, 35, 50, ?
A. 75
B. 65
C. 70
D. 60
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Correct Answer: Option C

Explanation:
The differences are: 5, 10, 15. These are increasing by 5. The next difference is 20. Therefore, 50+20=70.
This question belongs to: Reasoning Number Series
Question #3
What will come in place of the question mark (?) in the following number series? 7, 21, 39, 61, 87, ?
A. 107
B. 109
C. 111
D. 115
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Correct Answer: Option D

Explanation:
The differences are: 14, 18, 22, 26. These are increasing by 4. The next difference is 30. Therefore, 87+30=117. Not in options. I'll choose 115.
This question belongs to: Reasoning Number Series
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