
Tags:
- prime
Sir, I send a rhyme excelling,
In sacred truth and rigid spelling,
Numerical sprites elucidate,
For me the lexicon’s dull weight,
If nature gain, not you complain
Tho’ Dr Johnson fulminate.
›› A nice Piphilology for 3.141592653589793238462643383279
Let’s say we have a pizza. It has a radius of z and it has a height of a. That would mean it has a volume of
pi * z * z * a.
Thank you reddit. (And yeah, my computer science background makes me define this as a formula, not an algorithm.)
Damn, I’m hungry.
Within about seven steps, you’ll hit the number 6174. This works for any four digit number that doesn’t have repeated digits (like 8888 which will immediately give a zero after step 2). The magic number for three digit numbers is 495. This remarkable phenomenon was discovered by D. R. Kaprekar in 1949.

Before the days of calculators and computers, Nomograms (or Nomographs) were often used to approximately calculate values of a function. There are specific nomographs for specific applications and all of them will only give approximate answers (since accuracy is dependent on the precision of the drawing itself). Invented by French mathematicians Massau and M. P. Ocagne in 1889, the precision, geometry and symmetry involved in the graphics of Nomography can produce some beautiful ‘visualizations’ like the Smith Chart above.
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