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) 184
664/2= 
<gadget id="calculator">664/2</gadget>
<output>332</output>
332   340/2= 
<gadget id="calculator">340/2</gadget>
<output>170</output>
170   x/2=89 so x=2*89= 
<gadget id="calculator">2*89</gadget>
<output>178</output>
178   ANSWER:178
<result>D</result>
Look at this series: 664, 332, 340, 170, ____, 89, ... What number should fill the blank?