Self Working Number Magic by Karl Fulves (Paperback)
Among the seemingly impossible tricks and stunts in this book:
Guessing a spectators age or how long a married couple have known each other; predicting the sum of a group of numbers and using your brain like a lightning calculator. This selection also includes tricks involving cards, calendars, magic squares and betting games.
The author even suggests stage patter to use while performing. With this book and a modicum of practice anyone can perform an assortment of number tricks that will astound and delight your audience.
Whatever your age or math skills, you’ll soon be baffling friends and relatives with over 100 fascinating, fool proof number tricks. 98 illustrations, 145 pages.