Impossible Objects: Amazing Optical Illusions to Confound & Astound

Impossible Objects: Amazing Optical Illusions to Confound & Astound Review

They’re impossible—yet they exist! These optical illusions could never take shape in real life, but on the page they fool perception and entice the eye. “The book is written for a general audience and does an excellent job of classifying and describing the impossible objects...An excellent introduction to impossible objects.”—Mathematics Teacher.

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Newdoku Vol. 1 (Spanish Edition)

Newdoku Vol. 1 (Spanish Edition) Review

El nuevo puzzle matematico en el que intervienen las 4 operaciones basicas de las matematicas. Suma, resta, multiplicacion y division. Mucho mas que un sudoku. / The new mathematical puzzle that involves the four basic operations of mathematics. Addition, subtraction, multiplication and division. More than a sudoku. Read more...

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