How to Use the Euclidean algorithm to find a number set's GCF

Here's a neat trick. Learn how to find the greatest common factor for a number set using the Euclidean algorithm! From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).