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Mathemagic: Magic, Puzzles and Games with Numbers by Royal V. Heath
More than 60 new puzzles and stunts based on the properties of numbers. Easy techniques for multiplying large numbers mentally, identifying unknown numbers, determining the date of any day in any year, such entertainments as The Lost Digit, and Psychic Bridge. Over 30 pages of magic squares, triangles, cubes, more. 76 illustrations.
Table of Contents for Mathemagic: Magic, Puzzles and Games with Numbers
| 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 |
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