Insert the missing number
2, 4, ..., 16, 32, 64, 128, 256  Pick:  A) 6  B) 5  C) 4  D) 3  E) 8
series is 2* Previous Number.   ANSW8R:8
<result>E</result>
Insert the missing number
2, 4, ..., 16, 32, 64, 128, 256