Levels and points
With an account you earn experience points (XP) while you study on the site: reading the theory and the exercises and answering the timed questions. Points raise your level and stay saved in your account. A wrong answer is worth zero points.
How you earn points
- Correct answer to a timed question
- 10 XP
- Correct answer given within the first minute
- +5 XP
- Every minute of active study, up to 180 minutes a day
- 1 XP
- Weekly goal completed
- 50–80 XP
Each question has two minutes. As soon as you confirm the answer, the full explanation appears with the points earned. When you end the session, the summary shows the active study time, the correct answers and the points earned.
Where to find the timed questions
The timed questions are in the index of each topic, below the exercises. These are the topics that have them.
Mathematical Analysis 1
- Sets, induction and elementary functions
- Complex numbers
- Limits and continuity
- Differential calculus and Taylor
- Graphing functions
- Integral calculus
- Improper integrals
- Numerical series
- Differential equations
Mathematical Analysis 2
- Functions of several variables
- Differential calculus in several variables
- Implicit functions
- Free and constrained maxima and minima
- Curves and line integrals
- Vector fields and Green’s theorem
- Double and triple integrals
- Surfaces, fluxes and the theorems of Gauss and Stokes
- Sequences and series of functions
- Power series and Taylor series
- Fourier series
Precalculus
- Elementary logic
- Powers and roots
- Factorization, Ruffini’s rule and polynomial division
- Polynomial and rational equations and inequalities
- Equations and inequalities with absolute value
- Irrational equations and inequalities
- Logarithmic equations and inequalities
- Exponential equations and inequalities
- Trigonometric equations and inequalities
- Analytic geometry and conic sections
Points only for those who are studying
Study time counts only while a theory, worked-example, exercise or timed-question page is open in the foreground and you are using it: scrolling the text, tapping the screen, opening a solution. After two minutes without activity the count stops, and it restarts with the next action. A page left open in another tab does not collect time.
An answer given in less than 10 seconds earns no points, because the question cannot be read in that time. A question already answered correctly in the previous 7 days is worth half the points. Answers are checked by the site, not by the browser.
The levels
There are 100 levels. Going from level n to level n + 1 takes 60 + 10 · (n − 1) XP: the first step takes 60 XP and each following level takes 10 more. The title changes every ten levels.
- FreshmanThe journey begins.levels 1–9 · from 0 XP
- ApprenticeThe basics are in place.levels 10–19 · from 900 XP
- ExplorerA new topic every day.levels 20–29 · from 2,850 XP
- KnightReady for any exercise.levels 30–39 · from 5,800 XP
- StrategistAlways knows where to start.levels 40–49 · from 9,750 XP
- ChampionQuick answers are the specialty.levels 50–59 · from 14,700 XP
- DoctorKnows the syllabus by heart.levels 60–69 · from 20,650 XP
- MasterOthers come for help.levels 70–79 · from 27,600 XP
- LegendTalked about in the hallways.levels 80–89 · from 35,550 XP
- MythBeyond every level.levels 90–100 · from 44,500 XP
Goals and milestones
Every Monday your account receives three goals for the week, tied to the topics you are working on. A completed goal adds its points to your total.
Milestones stay in your account and also give points: the first correct answer 20 XP, one hundred correct answers 100 XP, ten hours of study 100 XP, every topic of a subject tried at least once 150 XP. Every ten levels you reach a milestone worth 5 XP per level: 50 XP at level 10, 100 at level 20, up to 500 at level 100.