Insert the missing number.
8, 7, 11, 12, 14, 17, 17, 22, 20, (....) Choose the correct answer:
A) 27 B) 20 C) 22 D) 24 E) 26
There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22, 27) increasing by 3 and 5 respectively.   answer : 27
<result>A</result>
Insert the missing number.
8, 7, 11, 12, 14, 17, 17, 22, 20, (....)