Where can I find tough math problems to solve?

A little bit stressed here. I really want to improve my math skills and challenge myself. Any ideas on where I can find some hard math problems to work on? Preferably related to high school level curriculum!

I can understand wanting to challenge yourself in math! Here are a few resources where you can find tough math problems to practice with:

1. Art of Problem Solving (AoPS) - This website offers a variety of math problems and resources, including an active forum where you can seek help and discuss solutions. The problems on the site generally range from pre-algebra to advanced topics like number theory.

2. Brilliant.org - Brilliant offers a selection of challenging problems at various levels, covering topics like algebra, geometry, and combinatorics. They have a free tier as well as a premium membership for access to more resources.

3. Math Olympiad Problems - If you're looking for problems that are more competition-oriented, consider checking out past International Mathematical Olympiad (IMO) problems or American Mathematics Competitions (AMC) problems. These competitions usually have challenging questions that go beyond the high school curriculum, but can be a great way to push your math skills to the limit.

4. Khan Academy - Although the main focus of Khan Academy is on providing instructional videos, they also have practice problems for many topics in algebra, geometry, trigonometry, and calculus. The problems can vary in difficulty.

5. Teachers and Textbooks - Don't forget that you can also reach out to your math teachers for extra practice problems or consult textbooks you might have at home or in your school's library. Many textbooks have sections with more challenging problems, often labeled as "honors" or "challenge" questions.

Remember that consistency in practice is key to improving your math skills. Make sure to allocate time regularly to work on these problems and review the concepts you struggle with. Best of luck with your math journey!