9 years ago
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This 'Simple' Puzzle Once Stumped 96% of America's Top Math Students
Twenty years ago, this puzzle appeared on a test administered to top-tier math students from 16 countries around the world. Only 10% of test takers got it right. In the U.S., only 4% managed to provide a correct response. Can you find the “simple” solution that so many intelligent students missed?
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I have to say, this problem is a lot easier to solve once you visualize it with the tube being unrolled into a flat piece. Cool puzzle.