42, 40, 35, 33, 28, 26, ?  Answers
A) 21  B) 23  C) 28  D) 25  E) 28
This is a simple alternating subtraction series, with a pattern -2, -5, -2, -5, -2 ....   21nswer : 21.
<result>A</result>
42, 40, 35, 33, 28, 26, ?