A standard 8×8 chessboard can easily be covered (tiled) with non-overlapping dominoes (1×2 pieces): simply use 4 dominoes in each...
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Pizza Slices
Take a pizza and pick an arbitrary point in it. Suppose you cut the pizza into 8 slices by cutting...
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Ride a bike with round wheels and it rolls smoothly on a flat road (i.e., the axle remains level). Can...
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