DK-GEORGMOHR 2000 Problem 4
A rectangular floor is covered by a certain number of equally large quadratic tiles. The tiles along the edge are red, and the rest are white. There are equally many red and white tiles. How many tiles can there be?
Dataset text AI-MO AoPS. Quoted with source.
Official text: Georg Mohr Contest 2000 official paper, page 1.
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