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Numberphile: Season 2012

2012x11 7 And Happy Numbers

  • 2012-02-10T18:00:00Z on YouTube
  • 10m
  • United States
  • English
  • Documentary
7 is an example of a happy number, as opposed to sad numbers. What makes a number happy? Dr Ria Symonds is from the University of Nottingham.
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