Quants Questions : Number Series Set 2

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

Comments