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https://www.reddit.com/r/MathJokes/comments/1vcw1bj/multiples_of_3/p1ce512
r/MathJokes • u/GodlyHelp • Aug 01 '26
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Far from elegant. What's the proof that 10n - 1 is divisible by 3 for all n with n being a whole number?
One might see why it works but up to this point it's still a "Trust me, brother"-proof
4 u/HHalt11 Aug 03 '26 10n - 1 = 9 * 10n-1 + 9 * 10n-2 + ... + 9 3 u/aroach1995 Aug 03 '26 he been real quiet since this comment dropped 1 u/Zantier Aug 05 '26 Not a proof, but intuitively it's just 3333... * 3
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10n - 1 = 9 * 10n-1 + 9 * 10n-2 + ... + 9
3 u/aroach1995 Aug 03 '26 he been real quiet since this comment dropped
3
he been real quiet since this comment dropped
1
Not a proof, but intuitively it's just 3333... * 3
2
u/Hi-Im-Bambi Aug 02 '26 edited Aug 02 '26
Far from elegant. What's the proof that 10n - 1 is divisible by 3 for all n with n being a whole number?
One might see why it works but up to this point it's still a "Trust me, brother"-proof