Look at this series: 97, 97, 97, 87, 87, 87, 77, 77, 77 ... What number should come next?  Choices:
A) 66	B) 67	C) 68	D) 69	E) 70
Explanation:   In this series, each number is repeated, then 10 is subtracted to arrive at the next number.   Answer: Option 67
<result>B</result>
Look at this series: 97, 97, 97, 87, 87, 87, 77, 77, 77 ... What number should come next?