RE: Brainsteem Mathematics Challenges - Digital Sum

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Brainsteem Mathematics Challenges - Digital Sum

in mathematics •  7 years ago 

So 50! = 30414093201713378043612608166064768844377641568960512000000000000 and the sum is....216. But I can't get there other than by brute force.

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7 years ago by

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      ·  7 years ago 

    Praise the speed of modern computers! Yeah I was stumped too. I know there is probably a clever way, but I was stuck just with "brute force" as well

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        ·  7 years ago 

      Yes, it's very simple to compute that in many programming languages (I use Python) or tools (like Mathematica). I'm not even sure if there is an efficient analytical way to do it. I have play around a bit with it, but so far to no avail.

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