Question

If 1+4=5; 2+5=12; 3+6==21; what is 8+11

Answer 1

The answer should be 19 because if u add on 11 more to 8 you will get 19

Answer 2

8 + 11 = 40
there is a pattern. 1+4=5, the answer from the previous equation 5+2+5=12, 12+3+6=21, 21+8+11=40.
8+11=40