KöMaL 2025 K861
A group of eight friends wants to organize a tarot championship. In each game, four players take part, and any pair from the eight friends plays the same number of games. Prove that there will be more than 13 games in the championship.
Official text KöMaL. 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.