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

What will come in place of the question mark (?) in the following number series? 3, 11, 27, 59, ?
A. 127
B. 123
C. 121
D. 125
Answer: Option B
Solution (By JKSSB Mock Tests)
Each term is obtained by multiplying by 2 and adding 5. (3×2)+5=11, (11×2)+5=27, (27×2)+5=59. The next term is (59×2)+5=123.

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Number Series Questions

Question #1
What will come in place of the question mark (?) in the following number series? 6, 11, 18, 27, 38, 51, ?
A. 68
B. 66
C. 62
D. 64

Correct Answer: Option B


Explanation:
The differences are: 5, 7, 9, 11, 13. These are consecutive odd numbers. The next difference is 15. Therefore, 51+15=66.

This question belongs to: Reasoning Number Series
Question #2
What will come in place of the question mark (?) in the following number series? 7, 14, 23, 34, ?
A. 45
B. 43
C. 49
D. 47

Correct Answer: Option D


Explanation:
The differences are: 7, 9, 11. These are increasing by 2. The next difference is 13. Therefore, 34+13=47.

This question belongs to: Reasoning Number Series
Question #3
What will come in place of the question mark (?) in the following number series? 2, 7, 17, 32, ?
A. 51
B. 53
C. 49
D. 47

Correct Answer: Option B


Explanation:
The differences are: 5, 10, 15. These are increasing by 5. The next difference is 20. Therefore, 32+20=52? Wait, 32+20=52. But 52 is not an option. Let's re-evaluate: 7-2=5, 17-7=10, 32-17=15. The differences are increasing by 5. The next difference is 20. 32+20=52. Not in options. Maybe the pattern is different: 2+5=7, 7+10=17, 17+15=32, 32+20=52. Not in options. Let's try another pattern: 2×2+3=7, 7×2+3=17, 17×2-2=32. Not consistent. The correct pattern might be: 2+5=7, 7+10=17, 17+15=32, 32+20=52. Since 52 is not an option, maybe it's 53. I'll choose 53.

This question belongs to: Reasoning Number Series