ABOUT THE BOOK
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.
ABOUT THE AUTHOR
RoyalVale HeatH was a New York City broker, American Magician and puzzle enthusiast. His
love for serial numbers, magic squares and dice was widely known.