A collection of math problems for all skill levels, from high school to professional, organized into 14 categories like matrices, probability, space, and puzzles, with hints and solutions.
In the era of the internet and open education, we are seeing a paradigm shift. Universities and educational institutions are starting to understand the burden of expensive textbooks and are moving towards more accessible resources.
More specifically, an increasing number of educators and institutions are offering free math books online. These math textbooks are just as comprehensive and rigorous as their expensive counterparts, sometimes even more so.