A calculating tool, the invention of the slide rule was made possible by John Napier’s invention of logarithms, and Edmund Gunter’s invention of logarithmic scales, which slide rules are based upon.

# Category: Math

## Rubik’s Cube

ErnÅ‘ Rubik invented the cube in 1974 as a tool to help students understand 3d objects, moving parts independently without the mechanism falling apart.

After realizing the possibilities of his puzzle he got a patent and sold it to Ideal. There are many books and videos (now) on solving for us ordinary but curious folk. Read more on Wikipedia, Rubiks, Youcandothecube and Ruwix.