MethodMath is a free library of math practice problems, each with a hint and a full step-by-step solution, from high-school algebra to university calculus and linear algebra. It also explains the viral math puzzles that divide the internet, with the reasoning behind the answer.
Why MethodMath
You learn mathematics by doing it. Reading a lesson is a start, but the real progress happens when you try a problem, get stuck, find the missing idea and check your work. MethodMath is built around that moment: every problem is ordered from easy to hard, every hint gives the next step without the whole answer, and every solution shows each step so you can see exactly where your own work went wrong.
What you will find
- Practice problems with solutions, grouped by topic: calculus, linear algebra, combinatorics, probability, statistics, trigonometry, differential equations, Fourier series and more.
- Topic pages that gather the key formulas and methods, with links to the problems that use them.
- Viral math, explained: the famous questions such as 8 ÷ 2(2+2) or 0.999… = 1, answered clearly in the first lines, then proved.
How the pages are made
Each page states what it covers, then works through problems in a fixed format: the statement, a hint, and a complete solution. Answers are checked by independent computation whenever possible (for example, counting problems are verified by brute force). Formulas are typeset with KaTeX so they stay readable on every screen. When a reader reports a mistake, we review it and correct the page.
Who is behind it
MethodMath is run by Abdessamad El Hamdany, a mathematics teacher and the creator of the MethodMath channels, where functions, shapes and famous problems become sound and motion for more than 125,000 followers. He also runs PediaMath, a French mathematics encyclopedia.
Free, with no sign-up
All problems and solutions are free to read, with no account. The site may show ads to cover hosting and production costs; they never replace or hide the content.
Get in touch
Found a mistake, want a topic covered, or interested in working together? Use the contact form. You can also follow MethodMath on YouTube, Instagram and Facebook.