Frequently asked questions

Is it free?

Yes. No ads, no paywall.

Do I need an account?

You can try a sample of problems without one. Sign in for free to see every problem, keep track of your progress and, soon, get suggestions for what to solve next.

How are answers checked?

Type a number and we compare it with the stored answer. Round only when the problem asks you to. Every answer has been checked by solving the problem a second, independent time.

Why can’t I see the answer?

Working it out is the practice. Each problem has one hint if you get stuck.

Where do the problems come from?

From public problem collections. We reformat them, sort them into topics and check them. If you still find a mistake, use “Report a problem” under it.

I own a problem that appears here.

Write to hello@mathegoras.com and we will credit or remove it.