MINI #40 - SUM AND AVERAGE OF AN EVENLY SPACED LIST OF INTEGERS Number Theory Video by Art of Problem Solving's Richard Rusczyk. Read More
VACATION PLANS Probability, Counting and Combinatorics The Walton and the Brady families plan to vacation together in an 8-bedroom vacation home. John and Olivia will bring six children — boys, Jason, Ben and Jim-Bob, and girls, Mary Ellen, Erin and... Read More