Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?
Choose the correct choice from the following:
A) 85
B) 97
C) 109
D) 178
E) None
Explanation: This is an alternating division and addition series: First, divide by 2, and then add 8.   Answer: Option 178
<result>D</result>
Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?