Romesh Ranganathan took a circuitous route to comedy. The son of Sri Lankan immigrants in the UK, he taught high school math for about a decade before abandoning it for a full-time career in entertainment. He does standup, radio shows, podcasts and TV specials. As he started the North American leg of his current Hustle tour, Ranganathan stopped in at The World’s studio in Boston for a conversation with The World’s Carol Hills.