Science YouTubers attempting a topology puzzle – YouTube

A mug with some unexpectedly interesting math. More problem-solving at Brilliant: https://brilliant.org/3b1b https://brilliant.org/3b1bflipping Special thanks to these patrons: http://3b1b.co/mug-thanks Thanks to all the following channels for participating. Standup Maths https://www.youtube.com/user/standupmaths Wendover Productions https://www.youtube.com/user/Wendoverproductions Welch Labs: https://www.youtube.com/user/Taylorns34 MinutePhysics: https://www.youtube.com/user/minutephysics Ben Eater: https://www.youtube.com/user/eaterbc Mathologer: https://www.youtube.com/channel/UC1_uAIS3r8Vu6JjXWvastJg Singing Banana:…

The hardest problem on the hardest test – YouTube

A difficult geometry puzzle with an elegant solution. Practice more problem-solving at https://brilliant.org/3b1b Solution to the puzzle mentioned at the end: https://brilliant.org/3b1bindicator/ Special thanks to the following patrons: http://3b1b.co/putnam-thanks These videos exist thanks to Patreon: https://www.patreon.com/3blue1brown A different write-up of this solution: http://lsusmath.rickmabry.org/psisson/putnam/putnam-web.htm 1992 Putnam…

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