Ben Sparks continuing from Part 1, which is at: https://www.youtube.com/watch?v=FkVe8qrT0LA Go deeper with Ben's explanation at https://www.youtube.com/watch?v=0eqBG6lz2mE More links & stuff in full description below ↓↓↓ Ben Sparks Numberphile playlist: http://bit.ly/Sparks_Playlist Ben on the Numberphile Podcast: https://www.youtube.com/watch?v=-tGni9ObJWk Ben's website: https://www.bensparks.co.uk/ Ben's own YouTube channel: https://www.youtube.com/channel/UCNS_GTzkj_-qUoNAGaSX5jA Various cakes and cutting videos:    • Cakes & Cutting on Numberphile   Bertrand's Paradox: https://www.youtube.com/watch?v=mZBwsm6B280 Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. https://www.simonsfoundation.org/outreach/science-sandbox/ And support from The Akamai Foundation - dedicated to encouraging the next generation of technology innovators and equitable access to STEM education - https://www.akamai.com/company/corporate-responsibility/akamai-foundation NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Video by Brady Haran and Pete McPartlan Patreon: http://www.patreon.com/numberphile Numberphile T-Shirts and Merch: null Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9