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The twenty-one card trick
Published online by Cambridge University Press: 01 August 2016
Extract
1. Introduction
Nearly forty years ago (and I barely knowing the three times table), my father taught me the twenty-one card trick, amid background murmuring from mother as to its mysterious mathematical nature. Now, with a rather more questioning six year old, I have been made to look at how it works, and see what variations a budding Paul Daniels might introduce.
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- Research Article
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- Copyright © Mathematical Association 1985
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