A Colorful Unsolved Problem - Numberphile
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14:51
The Brick Factory Problem - Numberphile
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17:13
Um avanço no quadrado mágico - Numberphile
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24:52
What if all the world's biggest problems have the same solution?
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12:54
Every Unsolved Math problem that sounds Easy
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14:18
The Four Color Map Theorem - Numberphile
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16:39
500+ IQ Janitor Solves HARDEST Equation in Minutes Which Took Professor 2 Years To Solve
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15:33
P vs. NP - The Biggest Unsolved Problem in Computer Science
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14:19