Logarithm
Also called: log, logs, logarithm as inverse, log rules, natural log, log returns
The inverse of exponentiation — it answers 'what power turns this base into that number?'. In finance it tames compounding: log returns add up neatly across time where percentage returns don't.
Where this is taught
Definitions are the trailer. These free levels turn Logarithm into something you play — one bite-size lesson, with worked examples, a quiz and XP.