Look at this series: 83, 80, 85, 82, 87, 84, ... What number should come next?  Select
A) 89
B) 95
C) 85
D) 83
E) 80
Explanation:   In this simple alternating subtraction and addition series; 3 is subtracted, then 5 is added, and so on.   89nswer: Option 89
<result>A</result>
Look at this series: 83, 80, 85, 82, 87, 84, ... What number should come next?