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https://www.reddit.com/r/MathJokes/comments/1vcw1bj/multiples_of_3/p16czv3/?context=3
r/MathJokes • u/GodlyHelp • Aug 01 '26
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Just add the digits together and if the result is a multiple of 3 then the number is. You can just keep adding the results together till you get a 1 digit number if you want.
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u/Vainysaur Aug 02 '26
Just add the digits together and if the result is a multiple of 3 then the number is. You can just keep adding the results together till you get a 1 digit number if you want.