1997 AIME Problems/Problem 2

Problem

The nine horizontal and nine vertical lines on an $8\times8$ checkeboard form $r$ rectangles, of which $s$ are squares. The number $s/r$ can be written in the form $m/n,$ where $m$ and $n$ are relatively prime positive integers. Find $m + n.$

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1997 AIME Problems/Problem 2

Problem

Solution

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