# Aptitude Questions: Number Series Set 19

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 !!!

In each of the following number series, a wrong number is given. Find out that number.

1. 1, 11, 38, 78, 175, 301
A.11
B.78
C.175
D.301
E.None of these
Explanation :
1+3^2+1 = 11
11+5^2+2 = 38
38+7^2+3 = 90
90+9^2+4 = 175
175+11^2+5 = 301

2. 7, 39, 85, 179, 211, 369, 879
A.369
B.211
C.179
D.879
E.None of these
Explanation :
7*2+3 = 17
17*2+5 = 39
39*2+7 = 85
85*2+9 = 179
179*2+11 = 369
369*2+13 = 751

3. 5, 8.5, 54.5, 90.25, 250.25, 125.125
A.90.25
B.8.5
C.250.25
D.125.125
E.None of these
Explanation :
5*0.5 = 2.5+6 = 8.5
8.5*5 = 42.5+12 = 54.5
54.5*0.5 = 27.25+18 = 45.25
45.25*5 =226.25+24 = 250.25
250.25*0.5 = 125.125

4. 65, 91, 13, 45.5, 2.6, 30.50, 0.52, 11.375
A.11.375
B.2.6
C.30.50
D.0.52
E.None of these
Explanation :
65*0.2 = 13
91/2= 45.5
13*0.2 = 2.6
45.5/2 = 22.75
2.6*0.2 = 0.52
22.75/2 = 11.375

5. 4, 100, 296, 654, 988, 1484
A.296
B.1484
C.988
D.654
E.None of these
Explanation :
4+96 = 100
100+196 = 296
296+296 = 592
592+396 = 988
988+496 = 1484

6. 163, 86.5, 98.5, 159.75, 339.5, 873.5
A.98.5
B.163
C.339.5
D.873.5
E.None of these
Explanation :
163*0.5+5 = 86.5
86.5*1+10 = 96.5
96.5*1.5+15 = 159.75
159.75*2+20 =339.5
339.5*2.5+25 = 873.75

7. 2, 20, 30, 72, 90, 140, 182
A.72
B.140
C.182
D.30
E.None of these
Explanation :
2^2 -2 = 2
4^2+4 = 20
6^2-6 = 30
8^2+8 = 72
10^2-10 = 90
12^2+12 = 156
14^2-14 = 182

8. 342, 512, 728, 999, 1330, 1727
A.512
B.999
C.1330
D.1727
E.None of these
Explanation :
7^3-1 = 342
8^3-1 = 511
9^3 – 1 = 728
10^3 – 1 = 999
11^3 – 1 = 1330
12^3 – 1 = 1727

9. 17, 23, 40, 63, 103, 166, 329, 435
A.435
B.166
C.329
D.103
E.None of these
Explanation :
17+23 = 40
23+40 = 63
40+63 = 103
63+103 = 166
103+166 = 269
166+269 = 435

10. 531, 552, 535, 514, 531, 552, 535
A.514
B.552
C.535
D.531
E.None of these