Question

IF
1 + 1 = 5
2 + 2 = 20
3 + 3 = 45
4 + 4 = 80
5 + 5 =??? ​

Answer 1

5 + 5 = 125

Logic:

Multiplying the numbers with each other then again multiplying the product with 5.

So, 5×5=25 and then multiplying by 5 = 125.