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This dissection puzzle comprises one of the oldest known mathematics puzzles and dates from Archimedes, more than two millennia ago. Not only is it a beautiful coffee table piece of art, its discovery and analysis comprises a rich and completely fascinating story that will amaze anyone who asks about it. Consult the Web for more information; of particular mathematical interest is the articley by Fan Chung and Ronald Graham: "A Tour of Archimedes' Stomachion"
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