I took a version of this class (called The Art of Approximation) with Dr. Mahajan when he was a visiting professor at Olin College. The course helped me become fearless about tackling a broad range of math problems I knew little about, and has helped me in countless real life situations from financial planning to major work decisions. Also, it's a great intro on good ways to nail PM interviews, at least at Google (wh…
Is it really just a few hours to go through it? :-)