Algebra
Advanced Math
Problem-Solving and Data Analysis
- Percentages
- Ratios, rates and units
- One-variable data: mean and median
- Probability and conditional probability
Geometry and Trigonometry
How our math questions are made
Each skill has a question template written by hand. Every time you ask for a set, the template fills in new numbers, chosen so the answer comes out exact. The wrong choices come from specific mistakes, like a sign error or dividing by the wrong value, so missing a question tells you which mistake you made. Before any question reaches you, code solves it a second, independent way and rejects it if the two answers disagree. More on how we write questions.