Questions asked in IBPS PO Prelims 2017 October 8th, 2017  1st Slot – Number Series

1) 1, 20, 58, 134, 286, ?

Logic: ×2+18, ×2+18, ×2+18

Answer: 590

2) 8, 7, 13, 38, 151, ?

Logic: ×1-1, ×2-1, ×3-1, ×4-1

Answer: 754

3) 32, ?, 1024, 2048, 2048

Logic: ×8, ×4, ×2, ×1

Answer: 256

4) 9, 5, 6, 10.5, 23, ?

Logic: ×0.5+0.5, ×1+1. ×1.5+1.5, ×2+2

Answer: 60

5) 18, 20, 26, 38, 58, 88

Logic: Difference of Difference- 4, 6, 8, 10

Answer: 58

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