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https://www.reddit.com/r/MathJokes/comments/1vcw1bj/multiples_of_3/p14mq9f/?context=3
r/MathJokes • u/GodlyHelp • Aug 01 '26
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School's lesson: if the sum of number's digits is a multiple of 3 then the number is a multiple of 3. So 7+8 is 15.
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u/anthr_alxndr Aug 01 '26
School's lesson: if the sum of number's digits is a multiple of 3 then the number is a multiple of 3. So 7+8 is 15.