KöMaL 2019 K613
Two persons are playing the following game: they take turns in writing positive integers not greater than 10 on a blackboard. A number is not allowed if it is a factor of some number that has been written before. The player who is not able to write a new number on the board will lose the game. Which player has a winning strategy?
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.