Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?

Look at this series: 664, 332, 340, 170, ____, 89, ... What number sho

1.	Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?
A.	178
B.	109
C.	97
D.	85
Answer» B. 109