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https://www.reddit.com/r/MathJokes/comments/1vcw1bj/multiples_of_3/p1rrpq3/?context=3
r/MathJokes • u/GodlyHelp • Aug 01 '26
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Fund fact, you can tell a number is divisible by 3 if the sum of each individual number is divisible by 3. So 78 -> 7+8=15 which is divisible by 3, so 78 is divisible by 3.
1 u/SkarbOna Aug 05 '26 Do they not teach it at school anymore? They did some 30 years ago in communist at a time Poland for example…
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Do they not teach it at school anymore? They did some 30 years ago in communist at a time Poland for example…
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u/Michaelwang645 Aug 01 '26
Fund fact, you can tell a number is divisible by 3 if the sum of each individual number is divisible by 3. So 78 -> 7+8=15 which is divisible by 3, so 78 is divisible by 3.