Lewis Carroll’s Pillow Problem – Numberphile

From Numberphile.

Featuring Alex Bellos.
Check out Brilliant (get 20% off their premium service): https://brilliant.org/numberphile (sponsor)
More links & stuff in full description below ↓↓↓

More videos with Alex Bellos: http://bit.ly/Bellos_Playlist

Alex’s website: http://www.alexbellos.com

And his books on Amazon (including "So You Think You’ve Got Problems" in which this puzzle features): https://amzn.to/3cRViyf and https://amzn.to/2xfDUUZ

Monty Hall Problem: http://bit.ly/MontyHallProb

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 Math For America – https://www.mathforamerica.org/

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 Pete McPartlan and Brady Haran

Patreon: http://www.patreon.com/numberphile

Numberphile T-Shirts and Merch: https://teespring.com/stores/numberphile

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

Clock sound by InspectorJ at freesound.org