Number Series Asked in IBPS PO - VI (Prelim) Exam - 16.10.2016 (4th Shift)

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

1) 22        10         8         12         40         ?

2) 6         14         39         160         795         ?

3) 25         29         20         36         11         ?

4) 18         23         36         56         82         ?

5) 13         21         37         69         ?         261

Answers:

22 x 0.5 – 1 = 10

10 x 1 (double of 0.5) – 2 (double of 1) = 8

8 x 2 – 4 = 12

12 x 4 – 8 = 40

40 x 8 – 16 = 304

2. e) 4776

6 x 2 + 2 = 14

14 x 3 – 3 = 39

39 x 4 + 4 = 160

160 x 5 – 5 = 795

795 x 6 + 6 = 4776

25 + 2² = 29

29 - 3² = 20

20 + 4² = 36

36 - 5² = 11

11 + 6² = 11 + 36 = 47

13 x 2 - 5 = 21

21 x 2 - 5 = 37

37 x 2 - 5 = 69

69 x 2 - 5 = 133

133 x 2 - 5 = 261

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