
What comes to mind when you think of 67? The number of throws in judo? "Jailhouse Rock?" (Rolling Stone calls it the 67th greatest song of all time.) The 67 seconds it took Elliot Spitzer to announce he was resigning from office? Your local mathematician will tell you that 67 is what's known as a lazy caterer's number, meaning it's part of the so-called lazy caterer sequence, which has to do with the number of pieces of a round object—say, a pizza—that can be made with a specific number of straight cuts. For example, if you make three straight cuts [...]