Mind blown, I never realized this coincidence:

You can use the next number in the Fibonacci sequence (1 1 2 3 5 8 13 21 34) to convert from miles to kilometers.

For example, 13 miles is 21 kilometers.



@fribbledom It's not really a coincidence. The "closed form" for fibonacci numbers uses the golden ratio $(1+√{5}/2)^n$ which is roughly $1.6ⁿ$

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@bremner @fribbledom yes, i convert from miles to kilometers using the x = 1 / (1+x) formula.

@bremner @fribbledom Well, it's sort of a coincidence that the ratio of kilometers to miles is very close to the golden ratio.

@bremner @fribbledom I /really/ appreciate this came from an instance called Mathstodon 🤓🔢🔣

@bremner @fribbledom It is a coincidence that the entirely arbitrary units of mile and kilometer have a ratio close to the mathematical concept of the golden ratio.
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