The hardest problem on the hardest test – YouTube

Spread the love

The hardest problem on the hardest test

A difficult geometry puzzle with an elegant solution.
Practice more problem-solving at

Solution to the puzzle mentioned at the end:

Special thanks to the following patrons:

These videos exist thanks to Patreon:

A different write-up of this solution:

1992 Putnam with this problem:

A problem with a similar flavor came up on the 2005 Putnam A6. Give it a try! In the solutions for that problem, by the way, the that Calvin Lin is a friend of mine who works at Brilliant.

Music by Vincent Rubinetti:


3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you’re into that).

If you are new to this channel and want to see more, a good place to start is this playlist:

Various social media stuffs:

Copyright © 2018 NEURALSCULPT.COM