Последние добавленные видео:
very-hard-math-problem
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43815023 3 years ago 22:09The Simplest Math Problem No One Can Solve - Collatz Conjecture
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15992787 7 years ago 11:15The hardest problem on the hardest test
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418967 11 months ago 14:05Every UNSOLVED Math Problem Explained in 14 Minutes
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5 years ago
5319539 5 years ago 16:03The unexpectedly hard windmill question (2011 IMO, Q2)