 Aptitude Questions – Number Series – Set 68[IBPS PO Prelim 2017]

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Welcome to Online Quantitative Aptitude Section in AffairsCloud.com. Here we are creating question sample in Number Series based on latest pattern, which is common for SBI,IBPS, RBI,LIC, NICL and other  competitive exams.

1. 32, ?, 1024, 2048, 2048
1. 324
2. 256
3. 224
4. 326
5. 274
Explanation :
32 * 8 = 256
256 * 4 = 1024
1024 * 2 = 2048

2. 9, 5, 6, 10.5, 23 ?
1. 50
2. 65
3. 70
4. 55
5. 60
Explanation :
9 * 0.5 + 0.5 = 5
5 * 1 + 1 = 6
6 * 1.5 + 1.5 = 10.5
10.5 * 2 + 2 = 23
23 * 2.5 + 2.5 = 60

3. 17, 98, 26, ?, 35, 80
1. 79
2. 69
3. 89
4. 59
5. 49
Explanation :
26 -17 = 9; 35 – 26 = 9
98 – 9 = 89

4. 2, 17, 89, 359, 1079, ?
1. 2143
2. 2152
3. 2169
4. 2159
5. 2148
Explanation :
2 * 6 + 5 = 17
17 * 5 + 4 = 89
89 * 4 + 3 = 359
359 * 3 + 2 = 1079
1079 * 2 + 1 = 2159

5. 7, 4.5 ,5.5, 12, 49,?
1.393
2.351
3.362
4.375
5.364
Explanation :
7 × 0.5 + 1 = 4.5.
4.5 × 1 + 1 = 5.5.
5.5 × 2 + 1 = 12.
12 × 4 + 1 = 49.
49 × 8 + 1 = 393.

6. 7, 7, 13, 37, 97, ?
1. 237
2. 247
3. 217
4. 227
5. 257
Explanation :
7 + 1³ – 1 = 7
7 + 2³ – 2 = 13
13 + 3³ – 3 = 37

7. 1, 20, 58, 134, 286, ?
1.600
2.590
3.580
4.570
5.560
Explanation :
1 * 2 + 18 = 20
20 * 2 + 18 = 58
58 * 2 + 18 = 134
134 * 2 + 18 = 286

8. 3, 5, 15, 45, 113, ?
1.253
2.263
3.243
4.651
5.655
Explanation :
3 * 1³ + 1 = 5
5 * 2³ + 2 = 15
15 * 3³ + 3 = 45
45 * 4³ + 4 = 113

9. 3.25, 6.5, 19.5, 78, 390, ?
1.2140
2.2350
3.2670
4.2340
5.2250
Explanation :
3.25 * 2 = 6.5
6.5 * 3 = 19.5
19.5 * 4 = 78

10. 68, 117, 61, 124, 54, ?
1.141
2.121
3.151
4.131
5.111