KöMaL 2009 B4231
Show that the number of terms with coefficients not divisible by 3 in the binomial expansion of (+) is not divisible by 5.
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.