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Cryptarithms are mathematical puzzles in which the digits in an arithmetic expression are replaced by letters of the alphabet. The object is to work out which ...
www.cryptarithms.com - 2009-02-04
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Mind Games, Flash Games Online, Edutainment, Mathematical recreations, Mind games, dudeney, Edward de bono, Lateral Thinking, Martin Gardner, Jar Games, ...
Alphametic 
www.mindgames-arni.com - 2009-02-08
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