Question

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

Answer 1

Answer:- 40

Explanation:-

1 + 4 = 5

2+5+4+1 = 12

3+6+2+5+4+1 = 21

8+11+3+6+2+5+4+1 = 40

Answer 2

Answer:

1+4=5...

2+5=12(5+7)

3+6=21(12+9)

8+11=40(21+19)