# Aptitude Questions: Number Series Set 38

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 !!!

Directions(1-10) : In these questions, a number series is given. Find out the missing number.

1. 14 8 6 6 7 ?
A. 6.5
B. 7.5
C. 8.5
D. 9.5
E. None of these
Explanation :
14 / 2 + 1 = 8
8 / 2 + 2 = 6
6 / 2 + 3 = 6

2. 6 13 20 65 256 ?
A. 1283
B. 1756
C. 2786
D. 2686
E. None of these
Explanation :
6 * 1 + 7 = 13
13 * 2 – 6 = 20
20 * 3 + 5 = 65….

3. 24 28 40 ? 88 124
A. 40
B. 60
C. 66
D. 35
E. None of these
Explanation :
24 + 4 = 28
28 + 4*3 = 40
40 + 4*5 = 60…..

4. 15 8 7 16 60 ?
A. 362
B. 488
C. 388
D. 364
E. None of these
Explanation :
15 * 0.5 + 0.5 = 8
8 * 1 – 1 = 7
7 * 2 + 2 = 16; 16 * 4 – 4 = 60…

5. 19 23 40 70 113 ?
A. 145
B. 169
C. 144
D. 381
E. None of these
Explanation :
23 – 19 = 4
40 – 23 = 17
70 – 40 = 30; 17 – 4 = 13; 30 – 17 = 13….

6. 12, 6.5, 7.5, 12.75, 27.5, ?
A. 70.25
B. 73.25
C. 71.25
D. 74.25
E. None of these
Explanation :
12 * 0.5 + 0.5 = 6.5
6.5 * 1 + 1 = 7.5
7.5 * 1.5 + 1.5 = 12.75…..

7. 965 622 406 281 217 ?
A. 170
B. 180
C. 190
D. 160
E. None of these
Explanation :
965 – 343 = 622
622 – 216 = 406
406 – 125 = 281…..

8. 18, 22, 35, 121, 459 ?
A. 2331
B. 2531
C. 1509
D. 1459
E. None of these
Explanation :
18 * 1 + 4 = 22; 22*2 – 9 = 35; 35*3 + 16 =121 ….

9. 10 66 325 1304 3909 ?
A. 7850
B. 7820
C. 7460
D. 7560
E. None of these
Explanation :
10 * 6 + 6 = 66
66 * 5 – 5 = 325
325 * 4 + 4  = 1304
1304 * 3 – 3  = 3909….

10. 20, 119, 592, 2363, ?
A. 7086
B. 7082
C. 7087
D. 7085
E. None of these