Time Travel and Other Mathematical Bewilderments by Martin Gardner
Describes puzzles involving time travel paradoxes, hexes, stars, cards, anamorphic art, magic squares, and polygons. From coincidences that seem to violate the laws of time and space, to the perplexities of the rubber rope, to the centuries-old delights of tangram play, the puzzles, problems, and paradoxes presented in Time Travel and Other Mathematical Bewilderments reveal just how enlightening and entertaining mathematical recreations can be.
