Question

1+2=21, 2+3=36,3+4=43,4+5=?

Answer 1

1 + 2 = 21 , 2 + 3 = 36 , 3 + 4 = 43 , 4 + 5 = 58

Explanation:

1 + 2 = 21

3 + 2 = 32 + 4 = 36

3 + 4 = 43

4 + 5 = 54 + 4 = 58

Answer 2

1+2=21, 2+3=36, 3+4=43, 4+5=52.