What will come in place of the question mark (?) in the following number series? 3, 11, 27, 59, 123, ? MCQ with Answer and Explanation

What will come in place of the question mark (?) in the following number series? 3, 11, 27, 59, 123, ?
A. 253
B. 247
C. 249
D. 251
Answer: Option D
Solution (By JKExamLibrary)
Each term is obtained by multiplying by 2 and adding 5. (3×2)+5=11, (11×2)+5=27, (27×2)+5=59, (59×2)+5=123. The next term is (123×2)+5=251.

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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? 3, 9, 27, 81, ?
A. 324
B. 162
C. 405
D. 243

Correct Answer: Option D


Explanation:
Each term is multiplied by 3. Therefore, 81×3=243.

This question belongs to: Reasoning Number Series
Question #2
What will come in place of the question mark (?) in the following number series? 10, 20, 30, 40, 50, ?
A. 70
B. 55
C. 65
D. 60

Correct Answer: Option D


Explanation:
The series increases by 10 each time. Therefore, 50+10=60.

This question belongs to: Reasoning Number Series
Question #3
What will come in place of the question mark (?) in the following number series? 4, 10, 18, 28, ?
A. 40
B. 36
C. 38
D. 42

Correct Answer: Option A


Explanation:
The differences are: 6, 8, 10. These are increasing by 2. The next difference is 12. Therefore, 28+12=40.

This question belongs to: Reasoning Number Series