Courses from 1000+ universities
India banned Telegram after the NEET paper leak led to a retest for 2.28 million students. Class Central studied the scam, the money trail, and other platforms the leaks could move to.
600 Free Google Certifications
Artificial Intelligence
Language Learning
Data Analysis
Mathematical and Computational Methods
AP® Microeconomics
Competitive Strategy
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Challenge your mind with seven engaging puzzles, from counting hidden 8s to solving tricky mathematical riddles that test your logical thinking and problem-solving abilities.
Master advanced mathematical problem-solving techniques through a detailed walkthrough of a challenging Harvard entrance exam question, focusing on higher mathematics and the Lambert W function.
Explore a challenging geometry problem from the 2024 International Mathematical Olympiad, with step-by-step analysis and proof techniques for advanced mathematical reasoning.
Explore mathematical problem-solving techniques for the faulty odometer puzzle from the 2005 AMC, including multiple methods and a simulation to understand the solution.
Explore a challenging car puzzle from Popular Science, featuring two solution methods and insights into mathematical problem-solving techniques.
Explore a challenging fraction problem that stumps many students and learn key concepts for understanding circular area fractions.
Challenging logic puzzle from 1740: Three Dutch couples shop, with husbands paying more. Solve the intricate problem of determining individual expenditures using clever deduction and mathematical reasoning.
Explore multiple solutions to the classic clock hands overlap riddle, enhancing problem-solving skills and mathematical reasoning for tech interviews and brain teasers.
Challenging Indonesian logic puzzle explores complex number relationships through sum and product clues, testing advanced problem-solving skills and mathematical reasoning.
Explores AI's mathematical errors and persistence in incorrect answers, highlighting potential limitations and biases in artificial intelligence systems.
Explore geometric problem-solving techniques to find an angle in a complex figure, with two different solution approaches demonstrated for a Polish Mathematical Olympiad question.
Explore multiple approaches to solve a challenging cosine equation involving double and triple angles, demonstrating creative problem-solving techniques in trigonometry.
Solve a famous logic puzzle: determine the minimum tests needed to find 2 good batteries out of 4 good and 4 bad ones to power a flashlight. Explores strategies and provides proof.
Solve a challenging riddle about walking to college, testing your problem-solving skills and logical reasoning abilities.
Challenging mathematical puzzle involving age and house number, testing logical reasoning and problem-solving skills. Explore a unique problem from the International Championship of Mathematical Games.
Get personalized course recommendations, track subjects and courses with reminders, and more.