Number Series Asked in IBPS PO - VI (Prelim) Exam - 16.10.2016 (1st Shift)

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

1. 6         16         45         184         917         ?
a) 5056
b) 5506
c) 5006
d) 5060
e) 6050
2. 11         20         38         74         ?
a) 85
b) 96
c) 100
d) 136
e) 146

3. 15         21         38         65         101         ?
a) 150
b) 120
c) 125
d) 145
e) 154

4. 24         28         19         35         10         ?
a) 45
b) 44
c) 46
d) 42
e) 47

5. 14         6         4         4         8         ?
a) 32
b) 8
c) 4
d) 16
e) 14

Answers:

1. b) 5506

Solution:
6 x 2 + 4 = 16
16 x 3 - 3 = 45
45 x 4 + 4 = 184
184 x 5 - 5 = 917
917 x 6 - 6 = 5506

2. e) 146

Solution:
11 + 9 = 20
20 + 18 = 38
38 + 36 = 74
74 + 72 = 146

3. d) 145

Solution:
15 + 6 = 21
21 + 17  = 38 (17 = 6+11)
38 + 27 = 65 (27 = 17+10)
65 + 36 = 101 (36 = 27 + 9)
101 + 44 = 145 (44 = 36 + 8)

4. c) 46

Solution:
24 + 2² = 24 + 4 = 28
28 - 3² = 28 - 9 = 19
19 + 4² = 19 + 16 = 35
35 - 5² = 35 - 25 = 10
10 + 6² = 10 + 36 = 46

5. a) 32

Solution:
14 x 1 - 8 = 6
6 x 2 - 8 = 4
4 x 3 - 8 = 4
4 x 4 - 8 = 8
8 x 5 - 8 = 32

Thanks.

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