Question

1+4=5,2+5=12,3+6=21,8+11=?

Answer 1

1+4=5
2+5=12
3+6=21
then 8+11=96

Answer 2

Here is the explanation:-
1+4=5. (1*4 +1)
2+5=12 (2*5 +2)
3+6=21. (3*6 +3)
8+11=96. (8*11 +8)
So the Answer is 96
I hope you understand.