Look at this series: 0.05, 0.2, ____, 3.2, 12.8, ... What number should fill the blank?  Choose one
A) 0.5
B) 0.6
C) 0.9
D) 0.7
E) 0.8
This is a simple multiplication series. Each number is 4 times greater than the previous number.   Answer: 0.8
<result>E</result>
Look at this series: 0.05, 0.2, ____, 3.2, 12.8, ... What number should fill the blank?