Best Challenging Problems
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1
Brilliant.org
Brilliant.org offers interactive courses and challenging problems in math, science, and computer science. Users can earn a certificate of completion for completing courses, demonstrating their underst...
2
Beast Academy
Beast Academy is a challenging math curriculum designed for gifted students in grades 2-5. It uses a comic book format to engage students and develop their problem-solving skills. While it doesn't off...
3
Art of Problem Solving (AoPS)
Art of Problem Solving (AoPS) offers challenging math problems and courses for students interested in competitive math. While they don't offer traditional certificates, they provide a rigorous and eng...
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