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It's because they say "Some products can be obtained in more than one way so be sure to only include it once in your sum."
they mean more than "with the same multiplicand/multiplier"... if you get the same product with different multipliers, that should be excluded as well.
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Project Euler #32: Pandigital products
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It's because they say "Some products can be obtained in more than one way so be sure to only include it once in your sum."
they mean more than "with the same multiplicand/multiplier"... if you get the same product with different multipliers, that should be excluded as well.