Mathematics
The language reality is written in — sets, numbers, probability, and more — taught from intuition, for anyone who was told they're 'bad at math'.
Basic
Why Math Isn't Your Enemy If you think you're 'bad at math,' you were taught it wrong — not built wrong. This guide reframes what math is, decodes the scary notation, and hands you the mindset that finally makes it click.
Sets, Relations & Functions The three ideas almost all of math (and a lot of code) is built from: a set is a collection of distinct things, a relation connects things, and a function maps each input to exactly one output. Learn these and the rest of math has a vocabulary.
Numbers & Number Systems Numbers come in expanding families — counting numbers, integers, fractions, the reals — each invented to fix something the last couldn't do. And the same number can be written in different bases, which is the whole reason computers think in binary and hex.
Counting & Combinatorics How to count possibilities without listing them: multiply independent choices, and know when order matters (permutations) versus when it doesn't (combinations). It's the math behind probability, password strength, and why brute force blows up.
Probability & Statistics Probability measures how likely something is; statistics makes sense of data once it's collected. Together they're the everyday superpower for reasoning under uncertainty — and the single best defense against being fooled by numbers.