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The first number where the letter "A" is used is 1,000.
There are other vowels but A is not one of them.
The Declaration • November 26, 2018 • https://thedeclarationatcoloniahigh.com/33854/fun-factofthe-day/none-of-the-numbers-before-1000-contain-the-letter-a/
None of the numbers before 1,000 contain the letter A.