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Welcome to the Devil's Selection
a WORD and an IMAGE
turn the cards face up one by one
the phenomenon can be easily understood and the story can be added
Mathemagic: Magic, Puzzles, Games with Numbers, by Royal V Heath Jimmy Strange Welcome to the Devil's SelectionBy 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
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