Number Series asked RRB Assistant Prelim 24 September 2017

These questions are based on Number Series asked in RRB Assistant Prelims – Shift 1. Number Series asked IBPS RRB Assistant Prelim 24 September 2017.

1-5 were asked in 1st shift, 6-10 are based on these

408, 405, 396, 369, 288, ?
A) 89
B) 45
C) 90
D) 98
E) 111

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Option B
Pattern:
-3, -9, -27, -81, -243
220, 108, 52, 24, 10, ?
A) 3
B) 4
C) 6
D) 7
E) 8

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Option A
Pattern:
-112, -56, -28, -14, -7
91, 70, 51, 35, 23, ?
A) 5
B) 15
C) 16
D) 12
E) 8

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Option C
Pattern:
-21, -19, -16, -12, -7
8, 4, 6, 15, ?, 236.25
A) 76.75
B) 105.5
C) 98.25
D) 81.75
E) 52.5

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Option E
Pattern:
*0.5, *1.5, *2.5, *3.5
7, 8, 16, 43, ?, 232
A) 175
B) 107
C) 155
D) 145
E) 105

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Option B
Pattern:
+1^3, +2^3, +3^3, +4^3, ..
5, 9, 25, 61, 125, ?
A) 225
B) 235
C) 209
D) 198
E) 187

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Option A
Pattern:
+2^2, +4^2, +6^2, +8^2, ..
103, 81, 61, 44, 31, ?
A) 18
B) 28
C) 23
D) 17
E) 12

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Option C
Pattern:
-22, -20, -17, -13, -8
8, 5, 6, 13, ?, 425
A) 65
B) 78
C) 59
D) 53
E) 71

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Option D
Pattern:
*0.5 + 1, *1 + 1, *2 + 1, *4 + 1
1563, 1559, 1543, 1479, 1223, ?
A) 254
B) 176
C) 199
D) 123
E) 187

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Option C
Pattern:
-4, -16, -64, -256, -1024
291, 147, 75, 39, ?, 12
A) 18
B) 25
C) 31
D) 28
E) 21

View Answer
Option E
Pattern:
-144, -72, -36, -18, -9