The Daily Challenge with Po-Shen Loh is proud to open Combinatorics (https://live.poshenloh.com/course/3-c..., a course focusing on how to correctly answer tricky questions of the form "how many ways are there to ___?" This is our course philosophy video.

Combinatorics is Professor Loh's professional specialty. This course rapidly takes even middle school students to topics that most people don't learn until college, but which appear throughout middle and high school math competitions such as MATHCOUNTS and AMC 8.