IBPS RRB PO Prelims Number Series | Memory Based September – 2017

IBPS RRB PO Prelims Number Series | Memory Based September – 2017

Number Series All Shifts here :

1). 221, 109, 53, 25, 11, ?

2). 0.5, 12, 52, 106, 107, ?

3). 39, 31, 41, 29, 43, ?

4). 3, 5, 13, 49, ?, 1441,

5). 481, 477, 467, 439, 357, ?

6). 2, 8, 28, 54, 53, ?

7). 167, 164, 159, 150, ? , 100

8). 17, 31, 15, 33, 13 , ?

9). 973, 325, 109 , 37 , 13 , ?

10). 0.5, 2, 8, 35, ? , 1079

11). 519, 517, 509, 483, 403, ?

12). 27, 38, 51, 68, 87,?

13). 1094, 365, 122, 41, 14, ?

14). 7, 3, 2, 2, 4, ?

15). 1.5, 3.5, 10, 34, ?, 711

Solution :

1)
×2+3 In Reverse
It means 4 X2+3 =11
So Answer: 4

2)
×8+8, ×4+4, ×2+2, ×1+1 ×0.5+0.5
Answer: 54

3)
8, 10, 12, 14, 16 Difference
2, 2, 2, 2 Difference of Difference
Answer: 27

4)
×2-1, ×3-2, ×4-3, ×5-4, ×6-5
Answer: 241

5)
×8-8, ×4-4, ×2-2, ×1-1 ×0.5-0.5
Answer: 26

6)
×8-8, ×4-4, ×2-2, ×1-1 ×0.5-0.5
Answer: 26

7)
3, 5, 9, 17, 33 Difference
2, 4, 8, 16 Difference of Difference
Answer: 133

8)
14, 16, 18, 20, 22 Difference
2, 2, 2, 2 Difference of Difference
Answer: 35

9)
+2÷3, +2÷3, +2÷3, +2÷3,
Answer: 5

10)
×2+1, ×3+2, ×4+3, ×5+4, ×6+5
Answer: 179

11)
Difference of Difference: ×3
Answer: 241

12)
Difference of Difference: 2, 4, 2, 4
Answer: 110

13)
Logic:34×9, 33×9, 32×9, 31×9, 30×9
Answer: 5

14)
Logic: ×0.5-0.5, ×1-1, ×2-2, ×4-4, ×8-8
Answer: 24

15)
Logic:×1+2, ×2+3, ×3+4, ×4+5
Answer: 141

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