GIFT EXCHANGE Probability, Counting and Combinatorics Sam, Pam, Ken and Jen are exchanging gifts for the holiday. Each name is written on a slip of paper and placed in a bowl. Sam is the first to randomly select a name from the bowl. What is the... Read More
MINI #66 - SIMILARITY AND PROPORTIONAL REASONING Plane Geometry Proportional Reasoning Video by Art of Problem Solving's Richard Rusczyk. Read More
SHERLOCK: A STUDY IN PI Measurement Finalist in the 2017-2018 Math Video Challenge. This video was created by Salk School of Science. Read More