6, 11, 21, 36, 56, 81, ? Choose the correct choice from the following.
A) 111 B) 71 C) 81 D) 61 E) 91
The pattern is + 5, + 10, + 15, + 20, + 25, + 30, + 35, + 40, + 45, + 50,....   111nswer : 111.
<result>A</result>
6, 11, 21, 36, 56, 81, ?