KöMaL 2021 B5150
Prove that there are only a finite number of positive integers that cannot be obtained by adding one of the digits of a smaller number to that number. What is the largest of these finite number of integers?
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.