BALTIC-WAY 2016 Problem 11
The set consists of 2016 positive integers. All prime divisors of these numbers are smaller than 30. Prove that there are four distinct numbers and in such that abcd is a perfect square.
Dataset text NuminaMath olympiads. 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.