# Aptitude Questions – Number Series Set 54

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. 5, 15, 65, 315, ?, 7815
A. 1695
B. 1935
C. 1565
D. 1685
E. None of these
Explanation :
5 * 5 – 10 = 15
15 * 5 – 10 = 65
65 * 5 – 10 = 315
315 * 5 – 10 = 1565
1565 * 5 – 10 = 7815

2. 8 18 28 90 356 ?
A. 1782
B. 1892
C. 1652
D. 1662
E. None of these
Explanation :
* 1 + 10
* 2 – 8
* 3 + 6

3. 2 12 52 162 332 ?
A. 342
B. 366
C. 396
D. 291
E. None of these
Explanation :
2 * 5 + 2 = 12
12 * 4 + 4 = 52
52 * 3 + 6 = 162

4. 4 14 44 150 ? 3090
A. 612
B. 632
C. 616
D. 618
E. None of these
Explanation :
4 * 1 + 10 * 1 = 14
14 * 2 + 8 * 2 = 44
44 * 3 + 6 * 3 = 150
150 * 4 + 4 * 4 = 616
616 * 5 + 2 * 5 = 3090

5. 2 51 87 112 128 137 ?
A. 152
B. 131
C. 213
D. 141
E. None of these
Explanation :
2 + 7² = 51
51 + 6² = 87
87 + 5² = 112
112 + 4² = 128
128 + 3² = 137
137 + 2² = 141

6. 5 8 8 10 13 ?
A. 12
B. 14
C. 18
D. 16
E. None of these
Explanation :
*2 – 2
/2 + 4
*2 – 6

7. 7 23 55 109 191 ?
A. 343
B. 323
C. 307
D. 303
E. None of these
Explanation :
2^3 – 1^2
3^3 – 2^2
4^3 – 3^2

8. 3 2 3 6 14 ?
A. 46.5
B. 36.5
C. 35.5
D. 45.5
E. None of these
Answer – E. None of these
Explanation :
3 * 0.5 + 0.5 = 2
2 * 1.0 + 1.0 = 3
3 * 1.5 + 1.5 = 6
6 * 2 + 2 = 14
14 * 2.5 + 2.5 = 37.5

9. 3 8 ? 76 235 696
A. 49
B. 26
C. 27
D. 22
E. None of these
Explanation :
3 * 3 – 1 = 8
8 * 3 + 3 = 27
27 * 3 – 5 = 76
76 * 3 + 7 = 235
235 * 3 – 9 = 696

10. 6 13 24 51 98 ?
A. 149
B. 159
C. 189
D. 201
E. None of these