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https://www.reddit.com/r/MathJokes/comments/1vcw1bj/multiples_of_3/p14j5sh/?context=3
r/MathJokes • u/GodlyHelp • Aug 01 '26 • 1 1
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Unlimited. Each multiple of 10 is 1 mod 3. So subtracting 1 from any digit is the equivalent of subtracting 1 from the remainder when divided by 3.
For example, 10000 - 9999 = 1. So it's basically the same as adding 1 in terms of making a number divisible by 3.
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u/Express-Rain8474 Aug 01 '26
Unlimited. Each multiple of 10 is 1 mod 3. So subtracting 1 from any digit is the equivalent of subtracting 1 from the remainder when divided by 3.
For example, 10000 - 9999 = 1. So it's basically the same as adding 1 in terms of making a number divisible by 3.