Math Memes @lemmy.blahaj.zone Sjmarf @sh.itjust.works 6mo ago

Kowalski, temperature analysis

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Fibonacci/Golden ratio = 1.618 Kilometres in 1 mile = 1.609

Conversion is off by less than 1%, not bad at all
- Yeah, it's nice and mysterious the first moment you hear about this but all the romance is gone once you think about how it works.
  
  By far the most complicated part is the fact that the ratio of successive terms in the Fibonacci sequence approaches a specific number (which happens to be the golden ratio, which happens to be close to the ratio of km/mi).
  
  The coincidence is still pretty cool
- Great, now I have two charts to memorize.
  
  You only have to memorize how the fibbonaci sequence works, which is just addind the previous 2 numbers together to get the next
- AND, oddly enough, less than 1% is how many people this is useful to!
  
  Almost exactly ~~half of 1%~~ 5%. The total population of The US, The UK, Liberia, and Belize is only 414,914,981 people. So 0.0517358337 of the population of the world cause this knowledge to be useful.
“can can”
- Here's the sound missing in that gif.
- You rang?
- Can you do the
  
  I can
  
  All I know is I can can the can can the only question is can a can can the can quick enough to can can the can can
Fun fact: If you have a scientific calculator (literal or app) but no other conversion tool available, the conversion factor between miles and kilometres is almost exactly ln 5. Disturbingly close in fact.

That's fewer keypresses than generating the Golden ratio or working out Fibonacci numbers. But if all you have is your head then, yeah, the Fibonacci trick is good enough in a pinch.
- Wow, that's pretty cool. Thanks.
There are many such ways to memorize conversion ratios. Admittedly, this one is particularly cool, since you can construct it from the fairly trivial fibonacci series. But I still feel, it's no replacement for the actual solution; get rid of imperial and adopt metric.
That's actually very useful.

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