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
Answer
(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
Answer
(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
Answer
(1) 216
4. 3, 7, 19, 39, 67, ?
1) 107
2) 113
3) 109
4) 103
5) none of these
Answer
(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
Answer
(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
Answer
(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
Answer
(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
Answer
(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
Answer
(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
Answer
(1) 12.25
Explanation: -4/2
516 – 4 = 512/2
256 – 4 = 252/2
.
.
28.5 – 4= 24.5/2 = 12.25