Independence Day - 78INDIA

# Number Series Asked in SBI PO Prelims Exam (Slot-I) - 02.07.2016

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

1. 7        5        7        17        63       ?
a) 308
b) 302
c) 309
d) 409
e) 390

2. 50      ?     61      89      154       280
a) 52
b) 51
c) 60
d) 62
e) 60

3. 17     19       25      37      ?       87
a) 47
b) 37
c) 57
d) 67
e) 75

4. 11      14      19       28      43       ?
a) 55
b) 44
c) 77
d) 88
e) 66

5. 26     144       590      1164      ?
a) 1296
b) 1182
c) 2059
d) 1182
e) 1181

1. c) 309
Solution:
7 x 1 – 2 = 5
5 x 2 – 3 = 7
7 x 3 – 4 = 17
17 x 4 – 5 = 63
63 x 5 – 6 = 309

2. a) 52
Solution:
50..50+(1^3+1) = 52
52+(2^3+1)=61.
61+(3^3+1)=89
89+(4^3+1)=154
154 + (5^3+1) = 280

3. c) 57
Solution:
17 + 1 x 2 = 19
19 + 2 x 3 = 25
25 + 3 x 4 = 37
37 + 4 x 5 = 57
57 + 5 x 6 = 87

4. e) 66
Solution:
3….5...9...15...23
…2....4....6....8…

5. b) 1182
Solution:
26 x 6 – 12 = 144
144 x 4 + 14 = 590
590 x 2 – 16 = 1164
1164 x 1 + 18 = 1182

Thanks.