Find A in the addition, given that B is a natural number.
A+A+AB A
5
The sum of three A's is such a number that has A in its ones place.
Therefore, the sum of two A's must be a number whose ones digit is 0.
This happens only for A = 0 and A = 5
If A = 0, then the sum is 0 + 0 + 0 = 0, which makes B = 0.
Given that B is a natural number, therefore B cannot be equal to 0. So we don't consider this possibility.
Hence, A = 5 5+5+51 5
Therefore, A= 5 and B= 1