Mathemagic: Magic, Puzzles and Games with Numbers - Royal V. Heath

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Résumé :
Includes elementary puzzles, number stunts, mental multiplication, interest rates, oddities, and more.

Sommaire:
Mathemagic Central Knows Your Age The Robber and the Sheep Family Histrick The Lie Detector Arithmental Whoopee An Eventric I'm Telling You The Dime and the Penny Child's Play A-Numgram Number Symphonies A Symphony in Fractions The Mystic Number 76923 The Magic Number 142857 1089 and All That You'd Never Think It of 19 and 9109 Some Pretty Arrangements All the Same Number Easy Ways to Multiply Arithmeticklish The Lost Digit The Coo-Coo Calculator Digitellus Dice-Cyphering There in Sequence Birthdate Trick How to Make Millions Multipractice Topsy Turvy Sleight of Mind Think of a Card An Amazing Memory Trick Tele-phoney At a Glance Psychic Bridge Juggling the Time Always the Same Number A Detectrick Digitslips Figure This Out Magic Squares Appendigits The Magic Triangle The Magis Square on the Hypotenuse The Magic Lovers The Magic Gridiron The Magic Explosion The Magic Square of Squares The Complementary Magic Square of Squares The Magic Honeycomb The Magic Web The Magic Wheel The Magic Quintuplets The Three Acrobats The Magic Block Method of Determining the Day of Any Date A Short-Cut Interest Method Raffles