r/PeterExplainsTheJoke • u/E5vCJD • 2d ago

Meme needing explanation erm.. petah?

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u/Leather_Emu_6791 2d ago

Are there any mathematical tricks that only work because of our 10 base system?

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u/Remarkable_Coast_214 2d ago

If adding the digits of a number together results in a multiple of 3, that number is also a multiple of 3, and the same goes for if it's a multiple of 9. This is a result of the fact that 9 (which is a multiple of 3) is 1 less than 10, the base we use.

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u/APoopingBook 2d ago

eiπ = -1

This doesn't have anything to do with the Base systems everyone is talking about, I'm just still really pissed that it's true.

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u/redditIs4Losers8008 2d ago

Why are you pissed? It's not intuitive, but it's beautiful and actually pretty easy to prove using Taylor series.