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Find the number of 10-digit numbers, where the sum of the digits is divisible by 7.

 Sep 21, 2021
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The numbers start at: 1,000,000,006,  1,000,000,015,  1,000,000,024......and so on. But there no fixed pattern that I know! However, I wrote a short computer code and it gave me a total =1,285,713,534 integers whose digit sums are divisible by 7.

 Sep 21, 2021

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