FWIW, please be mindful of your biases. I recently had an interviewer with a major bank conglomerate who had some silly puzzle. I outlined a system for solving it in algorithmic notation, and the interviewer had no idea that such a response was appropriate and said sorry, that they were looking for someone with programming experience, not specific, just "many languages" ... Not saying you do this, but what if someone provided Fizz Buzz in COQ or Elixir, or some kind of rule based solver? Honestly a lot of that may look like gibberish to me if I was looking just for a way to dismiss people. Or what if they never heard of Fizz Buzz? Anyway... my brain starts to fixate on all of these corner case scenarios in hiring where you're screwed because something "easy" never does solve the hard problem of hiring. What if the person couldn't do it because they think you're trying to trick them? Anyway... best of luck in your hiring.