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 IBPS,SBI,SSC and other competitive exams. We have included Some questions that are repeatedly asked in bank exams !!!
Directions (Q. 1-10): What should come in place of question mark (?) in the following number series?
1. 18, 96, 161, 213, 252, ?
1) 264
2) 278
3) 265
4) 291
5) none of these
(2) 278
Explanation: +78 ,+65 ,+52 ,+39 ,+26.
Table of 13
2. 7, 13, 24, 40, 61, ?
1) 87
2) 92
3) 89
4) 93
5) none of these
(1) 87
Explanation:
7+6=13
13+11=24
24+16=40
40+21=61
61+26=87
[Gap of +5 between 6,11,16,21,26]
3. 8, 12, 39, 55, 180, ?
1) 216
2) 238
3) 240
4) 206
5) 228
(1) 216
4. 3, 7, 19, 39, 67, ?
1) 107
2) 113
3) 109
4) 103
5) none of these
(4) 103
Explanation: +4 ,+12 ,+20 ,+28 ,+36.
Table of 4 with odd numbers
5. 759, 423, 255, 171, 129, ?
1) 118
2) 107
3) 98
4) 92
5) none of these
(5) NOT
Explanation: -336 ,-168 ,-84 ,-42 ,-21
Divide these differences by 2.
6. 0.8, 3.8, 12.6, 44.8, 188.2, ?
1) 758.6
2) 868.8
3) 952.00
4) 1012.2
5) 1112.2
(3) 952
Explanation:
0.8 × 1 + 3 = 3.8
3.8 × 2 + 5 = 12.6
12.6 × 3 + 7 = 44.8
44.8 × 4 + 9 = 188.2
188.2 × 5 + 11 = 952
7. 124, 215, 342, 511, ?, 999
1) 695
2) 625
3) 728
4) 806
5) 573
(3) 728
Explanation: 5^3-1 ,6^3-1 ,7^3-1 ,8^3-1 ,9^3-1
8. 18, 82, 118, 134, 138, ?
1) 132
2) 198
3) 125
4) 138
5) 192
(4) 138
Explanation: +8^2 ,+6^2 ,+4^2 ,+2^2 ,+0^2.
9. 5, 22, 103, 406, ?, 2422
1) 1516
2) 1298
3) 1136
4) 1602
5) 1213
(5) 1213
Explanation: *6-8 ,*5-7 ,*4-6 ,*3-5 ,*2-4
10. 516, 256, 126, 61, 28.5, ?
1) 12.25
2) 16.75
3) 14.25
4) 20.20
5) 18.75
(1) 12.25
Explanation: -4/2
516 – 4 = 512/2
256 – 4 = 252/2
.
.
28.5 – 4= 24.5/2 = 12.25
