AMC · AIME · COMC · Repêchage · CJMO · CMO
Get better at contest math, one problem at a time.
Real past problems, a hint ladder for when you're stuck, clear solutions, and the problems you missed brought back at the right time. No grades, no clock unless you want one.
5,546 problems from 344 past papers across 20 contests.
2023 AMC 10A · Problem 7
How many positive divisors of are perfect squares?
Built for practice, not for grading
Real contest problems
Past AMC 10/12, AIME, COMC, Repêchage, CJMO and CMO papers, credited to their sources.
Hints before solutions
Three steps: a nudge, the key idea, then the plan. Most of the time one hint is all you need.
Solutions that teach
Every solution ends with the key takeaway: the idea you can reuse on the next problem.
Retry what you missed
Missed problems come back a few days later, when retrying them does the most good.
Proof practice
Write olympiad proofs (or work on paper), then check yourself against a solution and rubric.
A path up the ladder
From your first AMC to the CMO: practice by contest, topic or level, and see your strengths grow.
Intermediate
AMC 10 · AMC 12
25 multiple-choice problems. The first contest most students target.
Advanced
AIME · COMC
Answers you have to find, not pick. Where real problem solving starts.
Olympiad
Repêchage · CJMO · CMO
Full proofs. Hard problems, one at a time, with rubrics to check yourself.
Coming next
Pascal · Cayley · Fermat · Euclid
The CEMC contests, with official solutions.
Questions
- Is it really free?
- Yes. Practicing past contest papers is free, and will stay free.
- Do I need a new account?
- No. Sign in with your Learn4Less account, the same one you use on learn4less.ca.
- Is this a test or a ranking?
- No. There are no grades and no leaderboards. It's a place to practice: try a problem, take a hint if you're stuck, read a clear solution, and come back to what you missed.
- Who writes the hints and solutions?
- Learn4Less writes original hints and solutions, and every answer key is checked twice independently. Official problems are credited to the CEMC, the CMS and the MAA.
- I'm a teacher. Can I use it with my class?
- Yes. Turn on teacher tools to create a class with a join code and assign past papers or problem sets.
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