IBPS CLERK PRE NUMBER SERIES 2107

Number Series questions asked in IBPS Clerk Pre 2017 Slot 1



a. 2, 3, 6, 15, 45 ?
b.10 12 16 24 40 ?
c.310 220 148 92 50 20 ?
d.221 ? 165 140 117 96 


Answers:
157.5 (x1.5 x2 x2.5 x3 x3.5)
72(DIfference 2 4 8 16 )
0 (Difference 10x9 9x8 7x8 6x7 5x6)
27(Double Diffeerence of (2)  ----29 27 25 23 21  )