OMM 1994 Problem 6

Show that we cannot tile a $10 x 10$ board with $25$ pieces of type $A$ , or with $25$ pieces of type $B$ , or with $25$ pieces of type $C$ .

Attachments:

Dataset text AI-MO AoPS. 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.