Problems based on Numbers Test 6

Let m and n be positive integers.
Difference of m and n is an even number either they are odd or even numbers.
${\mathit{m}}^2-{\mathit{n}}^2=\left(\mathit{m}-\mathit{n}\right)\left(\mathit{m}+\mathit{n}\right)$
m + n will be even in both the cases.
So, $\left({\mathit{m}}^2-{\mathit{n}}^2\right)$ Product of two even numbers that will always be divisible by 4.