Which number will replace the question mark in the following series 20 10 10 15 30 ........

General Intelligence and Reasoning (CHSL) Sequence, series & progression

Which number will replace the question mark (?) in the following series?

20, 10, 10, 15, 30, ?

As in Given series 20,10,10,15,30,?
Following pattern being followed :
20×0.5=10
10×1=10
10×1.5=15
15×2=30
30×2.5= 75
So Next term is 75

Hence option 2 is the correct answer.

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