Mathemagic: Magic, Puzzles and Games with Numbers

By (author): "Girard Lynton Kaufman, Jerome S. Meyer, Royal V. Heath"
Genres:Puzzles books  Number books  
Mathemagic: Magic, Puzzles and Games with Numbers
ISBN0486201104
ISBN139780486201108
AsinMathemagic: Magic, Puzzles and Games with Numbers
Original titleMathemagic: Magic, Puzzles and Games with Numbers
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.