1 , 9 , 17 , 33 , 49 , 73 , ? .....what is missing number in the series.

A) 55

B) 61

C) 77

D) 97

The series follow the patteren below

+8 , +8 , +16 , +16 , +24 ,+24

So missing number is 73 + 24 = 97

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