If Spring Break has already made you bored, you should know that the Problem Pontiff released the March Problem of the Month. It’s all about tiling rectangles with rectangles. In particular, rectangles with at least one side length being an integer.
For a full explanation of the problem and how to submit your solution, go to the POTM webpage.
And by remarkable cunning Adam Ladine was once again winner of the POTM!
Another tiling (from Indiana University’s Math Dept. gallary):