Art of Problem Solving: Factorial Introduction

Art of Problem Solving's Richard Rusczyk introduces factorials.

[anointed]

Thank you so much for explaining this, and in such a creative way. That's why it is called the "art" of problem solving. lol I appreciate it, man.

[yjaspal]

That is the most beautiful product placement I’ve ever seen

[hexa]

This video has the roughest and the smoothest advertisements I have ever seen in my life at the same time.

[VidhathShetty]

I love how he guides the natural discovery this allows for multiple things to be studied in here we could also have advertising and math insights🤫👍

[JanexConfetti]

8:36
A formula can be (if you wanna multiply all those together) is n!
n = number of books

[alexandruvighici]

How would this change if the 4 books there were only 3 colours?

[rocksaltzwidaz]

Fun fact: I found a copy of The art of problem solving on amazon for 2000 dollars.

[Mia-flon]

thanks so much! that made so much sense :)

[joeljohnson]

Recommended by 3blue 1brown good content subscribed

[kevinliu]

but it's better than any of the other non-AoPS videos I've seen

[cartimyboy]

Beginning of video: 0:10
AD: 2:15
Beginning of lesson: 2:40

[bsivoljr]

Thats not dry erase board!! That is Drywall! xD jkkk

[KubabHelped]

hes disguising a math problem as a good looking stack of books

[JanexConfetti]

stop advertising your books you just want money bruh