When it comes to coolness math really should be up there with new techniques, insights and methods. Often people actually think that it’s cool to not be able to do math! As part of 10 Minute School's mission to make math cool, we have tried to pull the best math shortcuts and interesting insights in our first release of 'Math Hacks". We will release updated versions of 'Math Hacks' and more cheat-books of this sort in the coming days. Enjoy and do share them with your peers. Math needs all the PR it can get!