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Symmetrical paths on a calculator
Published online by Cambridge University Press: 01 August 2016
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The first author discovered the property below while playing with his pocket calculator, and the second author then tried to find out what was behind this property. We enjoyed this voyage of discovery and thought that you might like to share it with us.
Actually, a calculator is not essential, but you will need a square array like in front of you. If your calculator looks different, that is no problem: all standard keyboards will work just as well.
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- Copyright © The Mathematical Association 1991