Number Series Problems with Solutions for SSC and Bank Exams

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number series problems with solution

Number Series Problems with Solutions for Competitive Exams


Q.9. 2, 6, 33, 49, 174, 210, ?  

(A) 275   

(B) 387

 (C) 464   

(D) 553  

(E) None of these  

Answer: option D

Solution:  

2, 6, 33, 49, 174, 210, ?   

1+13 = 2  

2+22 = 6  

6+33 = 33  

33+42 = 49   

49+53 = 174   

174+62 = 210   

210+73 = 553

Q.10. 4, 4, 6, 12, 30, ?, 315  

(A) 60   

(B) 75  

(C) 90    

(D) 115  

(E) 120

Answer: option C

Solution:  

4*1 = 4  

4*1.5 = 6  

6*2 = 12  

12*2.5 = 30  

30*3 = 90  

90*3.5 = 315  

Q.11. 16, 8.5, 9.5, 21, 88, ?  

(A) 512  

 (B) 624  

(C) 712   

(D) 848

(E) 976

Answer: option C

Solution:

16 × 0.5 + 0.5 = 4.5

8.5 × 1+ 1 = 9.5  

9.5 × 2 + 2 = 21

21 × 4 + 4 = 84

84 × 8 + 8 = 712


Q.12. 28, 32, 23, 39, 14, 50, ?  

(A) 1  

(B) 5  

(C) 14   

(D) 24

(E) 62

Answer: option A 

Solution:

28 + 22 = 28 + 4 = 32  

32 – 32 = 32 – 9 = 23  

23 + 42 = 23 + 16 = 39  

39 – 52 = 39 – 25 = 14  

14 + 62 = 14 + 36 = 50

50 – 72 = 50 – 49 = 1

Q.13. 4, 9, 17, ? , 69, 139, 277 

(A) 28   

(B) 35  

(C) 42   

(D) 51

(E) None of these  

Answer: option B

Solution:

4

9 = 4×2+1   

17 = 9×2–1  

35 = 17×2+1  

69 = 35×2–1  

139 = 69×2+1

277 = 139×2–1   

Q.14. 5, 6, 16, ?, 244, 1245 

(A) 28   

(B) 55

(C) 57  

(D) 61

(E) None of these

Answer: option C

Solution:

5

5 × 1+12 =5+1=6

6 × 2 + 22 = 12 + 4 = 16

16 × 3 + 32 = 48 + 9 = 57

57 × 4 + 42 = 228 + 16= 244

244 × 5 + 52 = 1245

Q.15. 3, 14, 39, ?, 155 , 258

(A) 84  

(B) 88

(C) 92

(D) 96

(E) 104

Answer: option A

Solution:

1+12+13=3

2+22+23=14

3+32+33= 39

4+42+43= 84

5+52+53= 155

6+62+63= 258

Q.16. 8, 9, 15, 32, ? , 250.5 

(A) 61  

(B) 65.5

(C) 82.5  

(D) 87

(E) 99

Answer: option C

Solution: 

8*1+1 = 9

9*1.5+1.5 = 15

15*2+2 = 32

32*2.5+2.5 = 82.5

82.5*3+3 = 250.5

If have any doubt or want to ask anything related number series problems, feel free and ask me in the comment section. Visit on the next page to practice more number series problems with solutions.

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Vikram Singh

Providing knowledgable questions of Reasoning and Aptitude for the competitive exams.

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