The Problems with Secret Santa Numberphile

Dr Hannah Fry discusses Secret Santa, anonymity and derangements. And a better way to do it. More links stuff in full description below More Hannah on Numberphile: Hannah s cowritten Xmas book: Hannah s love, math book: Numberphile poster: Graham s Number TShirt: Other Numberphile TShirts: Hannah on Objectivity: Support us on Patreon: NUMBERPHILE Website: Numberphile on Facebook: Numberphile tweets: Subscribe: Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): Videos by Brady Haran Brady s videos subreddit: h