I think these puzzles may be useful, but they do not respect the candidate's time. Candidates apply to many jobs, and it is unfair to expect them to each put ha

I think these puzzles may be useful, but they do not respect the candidate's time. Candidates apply to many jobs, and it is unfair to expect them to each put half an hour into a problem they may or may not be interested in for a job that may never call them. You can give your candidates this problem during an interview, but only if you are willing to give up time you could have otherwise spent in that interview getting to know the candidate in other ways.