Number Series Asked in IBPS PO - VI (Prelim) Exam - 22.10.2016 (2nd Shift)

Directions (1-5): What should come in place of the question mark (?) in the following number series? 

1. 8         4.5          5.5          13          56          ?  
a) 566
b) 496
c) 596
d) 450
e) 456

2. 19          16          44          107          ?
a) 108
b) 156
c) 215
d) 151
e) 251

3. 11          14          23          50          ?
a) 111
b) 121
c) 151
d) 131
e) 141

4. 19          25          42          71          113          ?
a) 169
b) 153
c) 186
d) 196
e) 269

5. 21          35          30          44          39 ?
a) 59
b) 53
c) 55
d) 45
e) 46


Answers:

1. e) 456

Solution:
8 x 0.5 + 0.5 = 4.5
4.5 x 1 + 1 = 5.5
5.5 x 2 + 2 = 13
13 x 4 + 4 = 56
56 x 8 + 8 = 456

2. c) 215

Solution:


3. d) 131

Solution:
11 + 31 = 11 + 3 = 14
14 + 32 = 14 + 9 = 23
23 + 33 = 23 + 27 = 50
50 + 34 = 50 + 81 = 131

4. a) 169

Solution:

5. b) 53

Solution:
21 + 14 = 35
35 – 5 = 30
30 + 14 = 44
44 – 5 = 39
39 + 14 = 53

Thanks.

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