Question 8
A subsquare is a square of any size bounded by grid lines. An $m\times n$ grid has exactly 2024 subsquares. Find the smallest possible value of $mn$.
For example, a $2\times2$ grid has five subsquares: four of side 1 and one of side 2.
For example, a $2\times2$ grid has five subsquares: four of side 1 and one of side 2.