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- Tags: Puzzle
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4!-Fold Puzzle
Are there any polycubes that can be unfolded into exactly a rectangle? This problem was solved in 2019. The smallest solution forms a nice puzzle — fold the rectangle into a polycube!
Tags: G4G14, polycube, polyominoes, Puzzle
The Icosian Game
A game created by Sir William Rowan Hamilton. A traveler must visit 20 cities without revisiting any of them.
Tags: dodecahedron, G4G13, Game, Puzzle