Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?
Options:
(A) 85
(B) 97
(C) 109
(D) 178
(E) 112 Hmmm, my stream of consciousness:
Answer: Option D
This is an alternating division and addition series: First, divide by 2, and then add 8. So, the answer is (D).