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6174 - Numberphile

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Uploaded on Dec 5, 2011

6174 is also known as Kaprekar's Constant.

This video features University of Nottingham physics professor Roger Bowley, who is also featured on our Sixty Symbols channel at http://www.youtube.com/sixtysymbols

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Numberphile tweets at https://twitter.com/#!/numberphile

Videos by Brady Haran

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