# How the Mathematical Ninja approximates $\ln(5)$ | Colin

“Isn’t it somewhere around $\phi$?” asked the student, brightly. “That number sure crops up in a lot of places!”

The Mathematical Ninja’s eyes narrowed.

“Like shells! And body proportions! And arrawk!”

Hands dusted. The Mathematical Ninja stood back. “The Vitruvian student!”

The student arrawked again as the circular machine he was now attached to started to stretch his legs and arms to the diagonal and back again.

“Not really,” said the Mathematical Ninja. “I mean, you’re right that it’s fairly close to $\phi$. But it’s not really related to $\phi$. And the ubiquity of the…