Number Series MCQs with Answers for JKSSB, SSC, Railway & Banking Exams

Question #101

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What will come in place of the question mark (?) in the following number series? 2, 6, 10, 14, 18, ?

A. 22

B. 26

C. 20

D. 24

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Correct Answer: Option A

Explanation:
The series increases by 4 each time. Therefore, 18+4=22.

This question belongs to: Reasoning Number Series

Question #102

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What will come in place of the question mark (?) in the following number series? 11, 23, 47, 95, ?

A. 185

B. 191

C. 187

D. 189

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Correct Answer: Option B

Explanation:
Each term is obtained by multiplying by 2 and adding 1. (11×2)+1=23, (23×2)+1=47, (47×2)+1=95. The next term is (95×2)+1=191.

This question belongs to: Reasoning Number Series

Question #103

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What will come in place of the question mark (?) in the following number series? 3, 5, 8, 12, 17, ?

A. 24

B. 23

C. 21

D. 22

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Correct Answer: Option B

Explanation:
The differences are: 2, 3, 4, 5. The next difference is 6. Therefore, 17+6=23.

This question belongs to: Reasoning Number Series

Question #104

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What will come in place of the question mark (?) in the following number series? 10, 13, 18, 25, ?

A. 34

B. 38

C. 36

D. 32

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Correct Answer: Option A

Explanation:
The differences are: 3, 5, 7. These are consecutive odd numbers. The next difference is 9. Therefore, 25+9=34.

This question belongs to: Reasoning Number Series

Question #105

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What will come in place of the question mark (?) in the following number series? 9, 17, 33, 65, ?

A. 125

B. 123

C. 121

D. 129

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Correct Answer: Option D

Explanation:
Each term is obtained by multiplying by 2 and subtracting 1. (9×2)-1=17, (17×2)-1=33, (33×2)-1=65. The next term is (65×2)-1=129.

This question belongs to: Reasoning Number Series

Question #106

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What will come in place of the question mark (?) in the following number series? 4, 8, 16, 32, ?

A. 48

B. 64

C. 56

D. 72

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Correct Answer: Option B

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

This question belongs to: Reasoning Number Series

Question #107

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What will come in place of the question mark (?) in the following number series? 1, 5, 13, 29, ?

A. 59

B. 63

C. 61

D. 57

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Correct Answer: Option C

Explanation:
Each term is obtained by multiplying by 2 and adding 3. (1×2)+3=5, (5×2)+3=13, (13×2)+3=29. The next term is (29×2)+3=61.

This question belongs to: Reasoning Number Series

Question #108

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What will come in place of the question mark (?) in the following number series? 6, 10, 16, 24, ?

A. 30

B. 34

C. 32

D. 36

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Correct Answer: Option B

Explanation:
The differences are: 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 24+10=34.

This question belongs to: Reasoning Number Series

Question #109

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What will come in place of the question mark (?) in the following number series? 12, 20, 30, 42, ?

A. 58

B. 54

C. 52

D. 56

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Correct Answer: Option D

Explanation:
The differences are: 8, 10, 12. These are increasing by 2. The next difference is 14. Therefore, 42+14=56.

This question belongs to: Reasoning Number Series

Question #110

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What will come in place of the question mark (?) in the following number series? 8, 10, 14, 20, ?

A. 28

B. 30

C. 32

D. 26

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Correct Answer: Option A

Explanation:
The differences are: 2, 4, 6. These are increasing by 2. The next difference is 8. Therefore, 20+8=28.

This question belongs to: Reasoning Number Series

Question #111

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What will come in place of the question mark (?) in the following number series? 2, 4, 8, 14, 22, ?

A. 30

B. 36

C. 32

D. 34

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Correct Answer: Option C

Explanation:
The differences are: 2, 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 22+10=32.

This question belongs to: Reasoning Number Series

Question #112

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What will come in place of the question mark (?) in the following number series? 7, 11, 17, 25, ?

A. 39

B. 35

C. 37

D. 33

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Correct Answer: Option B

Explanation:
The differences are: 4, 6, 8. These are increasing by 2. The next difference is 10. Therefore, 25+10=35.

This question belongs to: Reasoning Number Series

Question #113

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What will come in place of the question mark (?) in the following number series? 5, 14, 27, 44, ?

A. 63

B. 67

C. 61

D. 65

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Correct Answer: Option D

Explanation:
The differences are: 9, 13, 17. These are increasing by 4. The next difference is 21. Therefore, 44+21=65.

This question belongs to: Reasoning Number Series

Question #114

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What will come in place of the question mark (?) in the following number series? 3, 4, 7, 11, 18, ?

A. 29

B. 33

C. 31

D. 27

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Correct Answer: Option A

Explanation:
This is a Fibonacci-like series where each term is the sum of the previous two terms. 7+11=18, 11+18=29. The next term is 29.

This question belongs to: Reasoning Number Series

Question #115

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What will come in place of the question mark (?) in the following number series? 6, 13, 22, 33, ?

A. 44

B. 42

C. 43

D. 46

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Correct Answer: Option D

Explanation:
The differences are: 7, 9, 11. These are increasing by 2. The next difference is 13. Therefore, 33+13=46.

This question belongs to: Reasoning Number Series

Question #116

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What will come in place of the question mark (?) in the following number series? 3, 10, 21, 36, ?

A. 55

B. 57

C. 51

D. 53

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Correct Answer: Option A

Explanation:
The differences are: 7, 11, 15. These are increasing by 4. The next difference is 19. Therefore, 36+19=55.

This question belongs to: Reasoning Number Series

Question #117

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What will come in place of the question mark (?) in the following number series? 8, 18, 32, 50, ?

A. 70

B. 72

C. 68

D. 74

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Correct Answer: Option B

Explanation:
The pattern is: 2×2²=8, 2×3²=18, 2×4²=32, 2×5²=50. The next term is 2×6²=72.

This question belongs to: Reasoning Number Series

Question #118

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What will come in place of the question mark (?) in the following number series? 11, 17, 23, 29, ?

A. 35

B. 37

C. 31

D. 33

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Correct Answer: Option B

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 #119

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What will come in place of the question mark (?) in the following number series? 2, 11, 28, 53, ?

A. 82

B. 86

C. 84

D. 88

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Correct Answer: Option B

Explanation:
The differences are: 9, 17, 25. These are increasing by 8. The next difference is 33. Therefore, 53+33=86.

This question belongs to: Reasoning Number Series

Question #120

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What will come in place of the question mark (?) in the following number series? 5, 9, 17, 33, ?

A. 65

B. 67

C. 69

D. 63

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Correct Answer: Option A

Explanation:
Each term is obtained by multiplying by 2 and subtracting 1. (5×2)-1=9, (9×2)-1=17, (17×2)-1=33. The next term is (33×2)-1=65.

This question belongs to: Reasoning Number Series

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