Question 1

Who is Lemma for?

Accepted Answer

Students preparing for AMC 8, AMC 10/12, AIME, EGMO, national olympiads and the IMO — and anyone who simply wants to get better at hard problems. Level 1 assumes solid school arithmetic and nothing more, so you don't need competition experience to start.

Question 2

What do I actually get for free?

Accepted Answer

Levels 1 and 2 in full — that's real lessons and real practice, not a demo — plus the placement quiz, your dashboard, XP and your training record. No card is required and the free tier doesn't expire. If it turns out Lemma isn't for you, you'll know that before paying anything.

Question 3

What language is Lemma in?

Accepted Answer

Lemma is in English. The lessons, problems and the site itself are all English, and that's deliberate for the mathematics: olympiad papers and almost all serious olympiad literature are written in English, so reading maths in English is part of the preparation. Ukrainian and Russian interfaces are built and waiting on the curriculum being translated properly — we'd rather ship nothing than ship half a translation.

Question 4

How is this different from Art of Problem Solving?

Accepted Answer

AoPS is excellent and much bigger than us. The differences are price and structure: a single AoPS course typically costs more than a year of Lemma, and it runs on a fixed schedule. Lemma is self-paced, tells you what to do next every single day, and generates unlimited fresh practice instead of a fixed problem set you can accidentally memorise.

Question 5

What does 'mastered' mean here?

Accepted Answer

Something specific, not a participation badge. A concept counts as mastered only when you have solved five problems on it correctly at the hardest of six difficulty levels. Because problems are generated fresh each time, you cannot get there by grinding easy repeats or remembering an answer — you get there by actually being able to do it.

Question 6

How much time does this take?

Accepted Answer

There's over 200 hours of material, but it's built for short sessions. Twenty focused minutes a day will move you up the ladder steadily. We deliberately don't run a streak counter: it rewards showing up rather than working, and one missed evening wipes out something you'd grown attached to. Instead your record shows the last 28 days shaded by how much you actually did on each — so a real session and a two-minute tap-in never look the same, and missing a Tuesday costs you a Tuesday.

Question 7

Who am I paying, and is it secure?

Accepted Answer

Paddle, our authorised reseller, handles the payment and appears on your statement. They issue the invoice and take care of VAT in your country. Card details go to Paddle's own checkout and never reach Lemma's servers — we never see or store them.

Question 8

How do I cancel?

Accepted Answer

One button on your Profile page — no email, no phone call, no retention script. You keep access until the end of the period you already paid for. We'd rather you left easily and came back later than felt trapped.

Question 9

What if I pay and don't like it?

Accepted Answer

All payments are final — we don't offer refunds. If a paid plan isn't for you, cancel it: that stops every future charge immediately, and you keep access until the period you already paid for ends. Consumers in the EU/UK keep their 14-day statutory withdrawal right where it legally applies; see our Refund Policy for the specifics.

Question 10

What do you do with my data?

Accepted Answer

As little as possible. Your name, email, age, training profile and progress — that's the lot. We don't sell it, we don't advertise to you, and we don't use tracking cookies. You can download everything we hold, or delete your account outright, from your Profile page at any time.

Question 11

Is there a minimum age?

Accepted Answer

Yes, 13. If you're under 16 we ask that you go through the privacy policy with a parent or guardian, and if you're under 18 you should have their agreement before starting a paid plan.

Question 12

Will this get me onto the IMO team?

Accepted Answer

Nobody can promise that, and you should be suspicious of anyone who does. What we can promise is a coherent path, honest feedback about what you've actually mastered, and enough depth to keep going for years. The training helps; the result is still yours to earn.

Lemma — train for the maths olympiad

What's inside

Who it's for

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