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How many 10-digit numbers are there, such that the sum of the digits is divisible by 2?

I saw another forum with the same question, but the solution was to a different problem.

 Aug 24, 2020
 #1
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The first number =1,000,000,001
The last number =9,999,999,999

9,999,999,999 - 1,000,000,001 =8,999,999,998
8,999,999,998 / 2 + 1 =4,500,000,000 ten-digit numbers whose sum is divisible by 2.

 Aug 24, 2020
 #2
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that is wrong. read the question please, but thanks for trying

uvacowdo  Aug 25, 2020

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