# Quants Questions : Number Series Set 12

Hello Aspirants. Welcome to Online Quantitative Aptitude Section in AffairsCloud.com. Here we are creating question sample in Number Series, which is common for all the competitive exams. We have included Some questions that are repeatedly asked in bank exams !!!

1. 7,9,15,27, ?
A)74
B)47
C)63
D)59
E)None of these
B)47
Explanation :
7+(12+1) = 7+2 = 9
9+(22+2) = 9+6 = 15
15+(32+3) = 15+12 = 27
27+(42+4) =27+20 = 47

2. 63, 64.8, 67, 69.6 , ?
A)91.4
B)81.2
C)72.6
D)76.3
E)None of these
C)72.6
Explanation :
63+1.8 = 64.8
64.8+2.2 = 67
67+2.6 = 69.6
69.6+3 =72.6

3. 19, 36, 70, 121, ?
A)234
B)197
C)213
D)189
E)None of these
D)189
Explanation :
19+17 = 36
36+34 = 70
70+51 = 121
121+68 = 189

4. 121, 120, 116, 107, 91, ?
A)73
B)45
C)53
D)66
E)None of these
D)66
Explanation :
121 – 12  = 121-1 = 120
120 – 22  = 120 -4 = 116
116- 32 = 116-9 = 107
107-42 = 107 – 16 = 91
91 – 52 = 91 – 25 = 66

5. 213, 217, 210, 214, 207, 211, ?
A)215
B)245
C)204
D)323
E)None of these
C)204
Explanation :
213 +4 = 217
217 – 7 = 210
210+4 = 214
214-7 = 207
207+4 = 211
211-7 = 204

6. 816, 812, 404, 1200, 299, ?
A)1324
B)1475
C)1275
D)1534
E)None of these
B)1475
Explanation :
(816 – 4)*1 = 812
(812 – 4)÷2 = 404
(404 – 4)*3 = 1200
(1200 – 4)÷4 = 299
(299 – 4)*5 = 1475

7. 124, 120.5, 113.5, 103, 89, ?
A)78.4
B)65.4
C)71.5
D)81.5
E)None of these
C)71.5
Explanation :
124 – 3.5 = 120.5
120.5 – 7 = 113.5
113.5-10.5 = 103
103 – 14 = 89
89 – 17.5 = 71.5

8. 725, 724, 716, 689, 625, ?
A)750
B)528
C)465
D)500
E)None of these
D)500
Explanation :
725 – 13 = 724
724 – 8 = 716
716 – 27 = 689
689 – 64 = 625
625 – 125 = 500

9. 17, 22.5, 50.5, 157, 633.5, ?
A)3173
B)2345
C)1347
D)2457
E)None of these
A)3173
Explanation :
17*1 + 5.5 = 22.5
22.5*2+5.5 = 50.5
50.5*3+5.5 = 157
157*4+5.5 = 633.5
633.5*5+5.5 = 3173

10. 2, 13, 35, 79, 167, ?
A)416
B)343
C)321
D)257
E)None of these
B)343
Explanation :
2+11 = 13
13+22 = 35
35+44 = 79
79+88 = 167
167+176 = 343

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