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Card Forces
The straw is removed to show that the cut point has apparently moved with the straw
Steps & Injogs
Effects which for years have baffled magicians and laymen alike
with considerable historical data and bibliography
Mathematics, Magic & Mystery by Martin Gardner - Book Gerry and Banachek Card ForcesWhy do card tricks work? How can magicians do astonishing feats of mathematics mentally? Why do stage "mind reading" tricks work? As a rule we simply accept these tricks as "magic," we seldom recognize that they are really demonstrations of strict laws based on probability, sets, theory of numbers, topology and other branches of mathematics. This is the first book length study of this fascinating branch of recreational mathematics. Written by one of