I'm trying to challenge myself beyond my current high school math coursework. Do any of you know of any resources online where I can find really challenging high-level math problems to solve?
Sure, there are several online platforms where you can find challenging math problems. A platform that immediately comes to mind is Brilliant.org. This site offers problems and courses in a variety of math subjects and levels, including challenges that really push your conceptual understanding. It does have a subscription fee for full access, but you can access a substantial amount of content for free.
Another option is the Art of Problem Solving website, often simply referred to as AoPS. AoPS features a large collection of math problems as well, including a lot of problems from various prestigious math competitions if you're interested in testing your abilities with such problems.
Yet another resource is the MIT OpenCourseWare site. Here, you can access problem sets from actual MIT courses. Depending on your level, you might find some of the undergraduate math courses therein to be suitable for your needs.
Remember, it's not just about finding and solving hard problems; it's equally important to thoroughly understand the concepts and the solutions. Best of luck as you continue to challenge yourself in your math studies!
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