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