Climb to 1600.
Every question is a rated opponent on the real 400 to 1600 scale. Beat ones above your level and your score climbs. Your friends are on the board.
Free. A quick diagnostic sets your start; the board ends at 1600.
Line k passes through (2, 5) and is perpendicular to y = 2x − 3. What is the y-intercept of line k?
A score that plays fair
The rating rules are published, the math runs on the server, and nothing on the board is invented. Here is the whole system.
Every question is rated
Easy items sit at 850, medium at 1100, hard at 1350. Upsets pay: beating a question above your level moves you most, and those are real payouts from the live formula.
walking away is a skill
Skips are free
Bailing fast on a question you cannot crack is what strong test-takers do. Your score never moves on a skip, so the rating teaches the habit instead of punishing it.
117 to close
Friends keep it honest
Add friends by username and the board shows exactly who leads and by how much. Every row is a real account: no bots, no filler.
Try one right now
Straight from the bank: one of 360 original SAT-style questions across all eight digital SAT domains, in the style of released College Board and Khan Academy practice.
What value of x satisfies the equation 2(3x − 4) = 5x + 1?
Answer it. At a score of 1000 this question pays +12 or -7.
The road ends at 1600.
Eight questions find your level. Every point after that is earned.