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 counters on a chessboard we can perform multiplication, division, and square roots, even square roots of irrationals. #maths #mathtricks #mathematics

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Sources:
Gamma: Exploring Euler's Constant by Julian Havil
https://old.maa.org/press/periodicals/convergence/napiers-binary-chessboard-calculator-napiers-rabdologiae
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0:00 Intro
1:17 Multiplication
5:33 Division
11:33 Square Roots
17:59 Square Root of 2
20:48 Conclusion

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#wrath_of_math #napier's_bones #john_napier #john_napier_checkerboard #john_napier_chessboard #chessboard_calculator #checkerboard_calculator #how_to_do_multiplication_on_chessboard #division_on_chessboard #square_root_on_chessboard

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