A scientific calculator has two 'log' buttons on it. These are marked log and ln. The log key is used for calculations of the form \({\log _{10}}x\). For example, to work out that \(\log 10000 = 4 ...

The Rule of 72 has likely made its way to many table conversations about money. It’s a simple, almost magical calculation ...

Slide rules are analog computing devices marked with linear or logarithmic scales, some on a moving slide and some stationary on the base of the instrument, so that two numbers may be added or ...

Logarithms are a common idea today ... If you know how a slide rule works, you’ll find you already know much of what the video shows. The clockmaker was one of the people who worked out how ...