Embedded Player As we transition to our new host Manoush Zomorodi, Guy Raz looks back on some of his favorite episodes from his seven years hosting the TED Radio Hour. This episode originally aired on March 6, 2015. Math intimidates a lot of us, but it can deliver surprising answers to life's pressing questions. In this episode, TED speakers discuss the elegant simplicity, and giddy complexity, of solving for X.