Number Series for SBI PO :SET 79
1)Complete the series, 3, 8, 13, 24, 41, ?
a) 70
b) 66
c) 64
d) 62
e)None of these
2)7, 13, 25, 49 ?
a) 99
b) 97
c) 89
d) 87
e)None of these
3)608, 304, 152, 76 ?
a) 39
b) 36
c) 38
d) 37
e)None of these
4)8, 9, 20, 63 ?
a) 256
b) 252
c) 246
d) 242
e)none of these
5)5, 6, 10, 19 ?
a) 28
b) 37
c) 36
d) 35
e)None of these
6)2, 14, 84, 420, 1680, 5040 ?
a) 8940
b) 8680
c) 10080
d) 5030
e)None of these
7)12, 38, 116, 350, 1052, ?
a)1800
b) 2200
c) 2800
d) 3158
e)None of these
8)46080, 3840, 384, 48, 8, 2, ?
a) 1
b) 1/64
c) 1/8
d) 2
e)None of these
9)5,28,57,88,125
a) 156
b) 147
c) 166
d) 186
e)None of these
10)13, 18, 25, 30, 37, 40
a) 25
b) 30
c) 37
d) 40
e)None of these
4 comments
FOR QUESTION NO 2
ANS IS 85
pattern is *2-2.
Check again
FOR QUESTION NUMBER NUMBER 1.
THE SERIES IS 3 8 13 24 41
ANS
8-3=5, 13-8=5, 24-13=11, 41-24=17
THEN
5-5=0, 5-11=6, 11-17=6
AT THE END THE COMMON FACTOR IS 6 SO
6+17+41=64
SO ANS IS 64
The pattern followed is :
nth term + (n + 1) th term + (n + 1) = (n + 2) th term.
Thus, 1st term + 2nd term + 2 = 3rd term;
2nd term + 3rd term + 3 = 4th term and so on.
.’. Missing term = 6th term = 4th term + 5th term = 5
= 24 + 41 + 5 = 70.