Number Series Problems with Solutions for SSC and Bank Exams
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
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Vikram Singh
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