101010 divisible by 5 implies one of (a-b) and (a+b) is divisible by 5, notOriginally Posted by DenMac21
that one of them is 5. Also if one were 5 the other need not be divisible
Because it must be then it must be .
So, we have to solve system of equations in order to see whether are integers.
Since is not integer then b is not integer.
Is this proof valid?