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Why You Can't Bring Checkerboards to Math Exams
A chessboard and a set of counters makes a formidable calculation device. This is from the final part of John Napier's treatise called Rabdologia, or Rabdology. He called it 'Location Arithmetic as Performed on a Chessboard'. This method of using counters on a chessboard is based on binary and basic algebraic properties, and with only sliding ...
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