# Number Series asked in IBPS RRB Office Assistant (Multipurpose) Prelims Exam Held on 12th Nov 2016 (1st slot) – Memory Based

Number Series asked in IBPS RRB Office Assistant Prelims Exam  Held on 12th Nov Oct 2016 (1st slot) – Memory Based

Dear Readers, IBPS RRB Office Assistant (Multipurpose) Prelims Exam 12th Nov 2016 (1st slot) has finished, here we have given Memory based Number Series questions. Candidates those who are all going to write the examination can check this pattern and make use it.

Number Series Questions:

1). 8,4,4,6,12, ?
2). 157,150,136,115,87,?
3). 1,4,18,44,83, ?
4). 1,2,8,48,?
5). 12,13,17,26,42, ?

Solutions
1). Diff x0.5, x1, x1.5, x2, x2.5
8x 0.5 = 4
4x 1 = 4
4x 1.5 = 6
6x 2 = 12
12x 2.5 = 30

2). Diif of Diff 7, 7, 7, 7,7
157-7=150
150-14=136
136-21=115
115-28= 87
87-35 =52

3).Diff of Diff = 11, 12, 13, 14
1 +3 = 4  Diff (11)
4 + 14 = 18  Diff (12)
18 + 26 = 44  Diff (13)
44 + 39 = 83  Diff (14)
83 + 53 =136

4).
1x 2 = 2
2x 4 = 8
8x 6 = 48
48x 8 = 384

5). Diff of Diff is 1^1, 2^2, 3^2, 4^2
12+1=13
13+4=17
17+9=26
26+16=42
42+25=67