(via PBS Infinite Series) Imagine you have four cubes, whose faces are colored red, blue, yellow, and green. Can you stack these cubes so that each color appears exactly once on each of the four sides ...
Can you stack four colored cubes so that each color only shows once on each side? Imagine you have four cubes, whose faces are colored red, blue, yellow, and green. Can you stack these cubes so that ...
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