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By Martin Gardner

Why do card methods work? How can magicians do brilliant feats of arithmetic mentally? Why do degree "mind-reading" methods paintings? commonly, we easily settle for those tips and "magic" with out spotting that they are really demonstrations of strict legislation in accordance with chance, units, number theory, topology, and different branches of mathematics.
This is the 1st book-length examine of this interesting department of leisure arithmetic. Written via one of many most suitable specialists on mathematical magic, it employs significant old data to summarize all prior paintings during this box. it's also an inventive exam of legislation and their exemplification, with ratings of recent tips, insights, and demonstrations. Dozens of topological tips are defined, and dozens of manipulation tips are aligned with mathematical law.
Nontechnical, special, and transparent, this quantity includes one hundred fifteen sections discussing methods with playing cards, cube, cash, etc.; topological methods with handkerchiefs, playing cards, etc.; geometrical vanishing results; demonstrations with natural numbers; and dozens of different issues. you'll find out how a Moebius strip works and how a Curry sq. can "prove" that the complete isn't equivalent to the sum of its parts.
No ability at sleight of hand is required to accomplish the greater than 500 methods defined simply because arithmetic promises their good fortune. particular exam of legislation and their software allows you to create your personal difficulties and effects.

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Mathematics, Magic and Mystery

Why do card tips work? How can magicians do brilliant feats of arithmetic mentally? Why do degree "mind-reading" tips paintings? commonly, we easily settle for those methods and "magic" with out spotting that they are really demonstrations of strict legislation in accordance with chance, units, number theory, topology, and different branches of arithmetic.

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The card will therefore be sixth from the top of the packet. The trick works by a simple process of elimination. The first deal narrows the card to a group of nine, the second deal narrows it to three, and the last deal to one. It is easy to see this by turning the pile containing the card face down and putting a pencil mark on the back of the chosen card so it can be followed easily. Assemble the piles in any order and deal again. You will observe that the nine face-down cards are now distributed throughout the three piles, each pile containing three face-down cards.

The spelling terminates on the selected card. Method: The described procedure always places the chosen card nineteenth from the top of the pack. Therefore any phrase of nineteen letters will spell to the chosen card. Bill Nord, the New York City amateur conjuror who invented this effect, suggested "The Magic of Manhattan," but any phrase of nineteen letters will of course work just as well. Both this trick and the preceding one are based on the fact that if you add the digits in a number and subtract the total from the original number, the result will always be a multiple of nine.

It should be the card that has just been named. This trick is one of a number of recent effects that make use of the "center card" (either the 26th or 27th card from the top of the deck). , 1953. The handling given here, which differs slightly from Elmsley's, is that of the American magician Dai Vernon. BELCHOU'S ACES Magic by Mail The magician sends a deck through the mail to a friend, with the following instructions. He is to cut the deck as often as he wishes, give it one riffle shuffle, then cut it again as many times as desired.

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