Set, the card game: Difference between revisions
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Why does <code>isset</code>, the word that tests if three cards constitute a set, use <code>+</code> and <code>mod</code>?
If we map any of the properties, say colour, onto the numbers 0, 1 and 2, then the sum of three colours mod 3 is 0 if and only
::[https://web.math.princeton.edu/~charchan/SET.pdf SETs and Anti-SETs: The Math Behind the Game of SET, by Charlotte Chan]
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