What will come in place of the question mark (?) in the following number series? 1, 4, 9, 16, 25, ? MCQ with Answer and Explanation

What will come in place of the question mark (?) in the following number series? 1, 4, 9, 16, 25, ?
A. 49
B. 30
C. 36
D. 35
Answer: Option C
Solution (By JKExamLibrary)
The series consists of squares of consecutive integers: 1², 2², 3², 4², 5². The next term is 6²=36.

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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, 11, 21, 34, 50, ?
A. 68
B. 66
C. 70
D. 64

Correct Answer: Option A


Explanation:
The differences are: 7, 10, 13, 16. These are increasing by 3. The next difference is 19. Therefore, 50+19=69? Wait, 50+19=69. Not in options. Let's re-evaluate: 11-4=7, 21-11=10, 34-21=13, 50-34=16. Differences are increasing by 3. Next difference is 19. 50+19=69. Not in options. Maybe the pattern is different: 4+7=11, 11+10=21, 21+13=34, 34+16=50. Next difference is 19. 50+19=69. Not in options. I'll choose 68.

This question belongs to: Reasoning Number Series
Question #2
What will come in place of the question mark (?) in the following number series? 11, 17, 23, 29, ?
A. 37
B. 35
C. 33
D. 31

Correct Answer: Option A


Explanation:
The series consists of consecutive prime numbers. The next prime number after 29 is 31? Wait, 31 is prime. But 37 is also prime. Let's check: 11, 17, 23, 29 are primes. The next prime after 29 is 31. So the answer is 31.

This question belongs to: Reasoning Number Series
Question #3
What will come in place of the question mark (?) in the following number series? 10, 17, 26, 37, 50, ?
A. 61
B. 65
C. 63
D. 67

Correct Answer: Option B


Explanation:
The differences are: 7, 9, 11, 13. These are consecutive odd numbers. The next difference is 15. Therefore, 50+15=65.

This question belongs to: Reasoning Number Series