Question

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

Answer 1

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

The best way to answer this is to supply the missing or skipped equations to find the pattern.

1+4=5
2+5=12
3+6=21
4+7=32
5+8=45
6+9=60
7+10=77
8+11=96

The final answer is 96 based on the pattern above.