The most unexpected answer to a counting puzzle
Solution: Even prettier solution: Help fund future projects: An equally valuable form of support is to simply share some of the videos. Special thanks to these supporters: New to this channel It s all about teaching math visually. Take a look and see if there s anything you d like to learn. NY Times blog post about this problem: The original paper by Gregory Galperin: Evidently, Numberphile also described this problem (I had not known): You ll notice that video has an added factor of 16 throughout, which is not here. That s because they re only counting the collisions between blocks (well, balls in their case), and they re only counting to the point where
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