There are three loops in a tangle of rope. How many are independent, and how many are interlocked? Two knights stand on a chessboard. How many other knights must you add so that each square is occupied or threatened by a knight? Among six seemingly identical drawings of mandalas, each rotated by multiples of 60 degrees, one is different. Which is it, and why?
100 Geometric Games, Reprint Edition-P2P
English | 2015 | ISBN: 048678956X | 160 Pages | ePUB | 9 MB
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