A friend of mine on a neighboring team at Google presented me with an interesting math problem the other day. It went like this:
Friend: Hey Stevey!
Me: Uh, you know people don't actually call me that to my face, right? Only behind my back.
Friend: (cheerily) But you're Stevey! Look at your badge!
Me: Sigh. OK, fine already. What's this math problem?
Friend: Let's say there's this