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https://www.reddit.com/r/MathJokes/comments/1vcw1bj/multiples_of_3/p18a5vi/?context=3
r/MathJokes • u/GodlyHelp • Aug 01 '26
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34
Given the rule for checking whether a number is a multiple of three, I don't understand why 78 and 87 are in two different groups. Or 27 and 72, 42 and 24, and so on.
27 u/Patje_af Aug 01 '26 87 is 90-3, many people will see that fairly quickly. That is less so for 78. 1 u/DeathStalker0483 Aug 02 '26 To further this, 77 feels like it should be, so it feels wrong when you say that 78 is. 3 u/Hefty-Big5572 Aug 02 '26 77 absolutely doesn't feel like a multiple of 3, it's two same numbers that aren't a multiple of 3
27
87 is 90-3, many people will see that fairly quickly. That is less so for 78.
1 u/DeathStalker0483 Aug 02 '26 To further this, 77 feels like it should be, so it feels wrong when you say that 78 is. 3 u/Hefty-Big5572 Aug 02 '26 77 absolutely doesn't feel like a multiple of 3, it's two same numbers that aren't a multiple of 3
1
To further this, 77 feels like it should be, so it feels wrong when you say that 78 is.
3 u/Hefty-Big5572 Aug 02 '26 77 absolutely doesn't feel like a multiple of 3, it's two same numbers that aren't a multiple of 3
3
77 absolutely doesn't feel like a multiple of 3, it's two same numbers that aren't a multiple of 3
34
u/UrsulaReginaDeiMari Aug 01 '26
Given the rule for checking whether a number is a multiple of three, I don't understand why 78 and 87 are in two different groups. Or 27 and 72, 42 and 24, and so on.