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9780613755467
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Seeing shouldn't always be believing... It all depends on how you look at it--every one of these drawings has a built-in "deception." For example, in this picture how many cubes are there: 7 or 8? Count again: if you're focusing on the black tops, you'llJoyce, Katherine is the author of 'Optical Illusions (Pocket Puzzlers)' with ISBN 9780613755467 and ISBN 0613755464.
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