Dr James Grime discusses a couple of clever formulas which are pandigital - using all the numbers from 1-9.
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More on pandigital numbers: https://funtvkids.com/watchgaVMrqzb91w
More on e: https://funtvkids.com/watchAuA2EAgAegE
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The contest which gave us these formulas: https://www2.stetson.edu/~efriedma/mat...
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