30 CubedBased on mathematical principles that have challenged generations of mathematicians. The set contains 30 different cubes, plus a 6 x 5 grid and a puzzle solution booklet. Each cube features the same six base colours. The order of these colours varies from cube to cube. Every side on every cube features part of a "line". The lines appears in ten different colours. The puzzles all require the lines and or base colours to be connected in different ways,
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