Mathemagic: Magic, Puzzles, Games with Numbers, by Royal V Heath Jimmy Strange Various designs available

Various designs available

Each time they manage to separate themselves into their respective colours

the phenomenon can be easily understood and the story can be added

using a number that was arrived at by throwing a pair of ungimmicked dice

Mathemagic: Magic, Puzzles, Games with Numbers, by Royal V Heath Jimmy Strange Various designs availableBy 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, interest rates worked in one's head, such entertainments as the Lost Digit, and Psychic Bridge. Over 30 pages of magic squares, triangles, cubes, much more. Inexhaustible source of stimulating mathematical recreation. 76