<p>Brilliant is an interactive problem-solving platform offering self-paced mathematics courses covering arithmetic, algebra, probability, calculus, and related topics. Lessons use visual and hands-on problem sets rather than video lectures, with step-by-step feedback that adapts to the learner's progress. Well-suited for developing mathematical intuition and problem-solving skills alongside school curricula or olympiad preparation.</p><ul><li>Self-paced, with daily 5–15 minute challenges and guided course paths.</li><li>Free tier includes a limited number of lessons per day plus daily challenges; premium unlocks the full course library.</li><li>Mathematics courses span foundational arithmetic through calculus, linear algebra, and number theory.</li><li>Also covers computer science, coding, data analysis, and scientific foundations alongside the maths track.</li><li>Platform does not issue formal certificates or college credit – purpose is skill-building, not accreditation.</li></ul><p>Create a free account at brilliant.org to start learning; premium subscriptions unlock the full library.</p>