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Find the number of 10-digit numbers where the sum of the digits is divisible by 5 

 

Thank you!

 Jan 14, 2020
 #1
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The answer is 200,000,000.

 Jan 14, 2020
 #2
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[9,999,999,995 - 1,000,000,000] / 5 + 1 =1,800,000,000 such numbers

 Jan 14, 2020

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