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Turnabout

Is this a bad sum?

turnabout

Not in a mirror:

turnabout reversal

Adapted by Martin Gardner from Henry Dudeney.

January 6, 2008October 4, 2010 | Language · Science & Math

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Futility Closet is a collection of entertaining curiosities in history, literature, language, art, philosophy, and mathematics, designed to help you waste time as enjoyably as possible.

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