NL-NWO 1993 Problem 1
Show that any subset of with or more elements contains at least two distinct numbers the product of which is a perfect square.
Dataset text AI-MO AoPS. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
Similar problems
These problems have the most words in common with this statement.