Let [n] = 1 if n is odd and 0 if n is even, for all positive integer n. if [n] * [n+8] = 0, then what is one possible value of n?

if either or both of and are 0, i.e. if one or both of and are even. But both will be even if is even, and odd otherwise, so any even will be a solution, e.g. .

The answer is 1 because you have to flip the sign when dividing by negative number and 3