If that's the hardest question they ask you, then maybe you're right to leave. You're at least right not to take the job in that case. Actually leaving is a bi

If that's the hardest question they ask you, then maybe you're right to leave. You're at least right not to take the job in that case. Actually leaving is a bit harsh, though, since you don't know why they're asking the question. And you're definitely burning a bridge, which is probably a bad idea. Why don't you ask the interviewer why they're using that question - after you answer it correctly and quickly? That will get you more insight into the company or at least the interviewer. I sometimes use questions like that very early in an interview to make sure candidates didn't fake their way through the phone screen to get to the on-site interview. People who can't do the simple stuff do sometimes slip through. I'm not trying to insult the intelligence or skills of the candidate, I'm just trying to see if they can pass that low bar before getting to the interesting questions.