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Math e Magic (blaues Cover)

Magic - Puzzles - Games with Numbers

13,7 x 20,4 cm, 126 S., Dover Publications, Inc., New York, 1953, broschiert

One of the most famous books in the field of recreational mathematics, this collection contains some 49 different puzzles, plus a variety of other stunts based on the properties of numbers. Under such names as The Lost Digit, The Three Acrobats, Psychic Bridge, Digitellus, Multipractice, A-Numgram, The Mystic Number 76923, A Detectrick, etc., Heath's challenging problems offer hours of rewarding distraction for any math puzzle enthusiast. Over 35 pages are devoted to the ever-popular magic squares: easy methods for their construction, magic triangles, magic cubes, magic circles, honeycombs, and other material not easily available elsewhere. Finally, a number of miscellaneous chapters provide you with sure, easy techniques that almost anyone can apply to multiplying large numbers mentally, working out the age of friends, identifying unknown numbers, working out interest rates mentally, and determining the date of any day of any year.

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