534 Vaughan-Lee waving a cube very quickly.
535 The Professor with the guts of a disassembled cube.
536 Alex solving a cube.
537 Demonstrating how cyclic properties allow you to change only certain faces.
538 The number of permutations of faces when asembling a cube, very big.
539 And again.
540 The number of moves needed to make a random cube into the 'perfect' state, assuming you know every permutation, and how to move between them.
541 Faintly, the current best known least number of moves - 43.
542 Combination to make a pretty pattern.
543 Alex and an alternatively shaped cube.
544 Alasdair Kergon looks on as Ian Collier attempts a 4-cube.

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