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We’ve all seen videos of Rubik’s cube champions who can solve the puzzle in less than 5 seconds. And there are cube-twisting robots that can solve the cube even faster, often in under a second.

It is rare to find a puzzle, or toy, that has captured the imagination of millions, is accessible to all age levels, is challenging, yet satisfying, and is so mathematically rich. Rubik's cube is one such puzzle. The applet below was written by Werner ...

Bryant says there are countless iterations of twisty puzzles inspired by the traditional 3x3 Rubik’s Cube ... include a single-solve for the 2x2 cube, which he completed in less than a ...