i have the perspective that these types of puzzle questions by the interviewer are pointless. and i was getting at the point that the interviewee asking similar pointed questions would be similarly useless. because it's easy to take that high and mighty stance instead of having a conversation. it creates an artificial environment that doesn't really exist in actual working environments.
and i generally feel that companies are far too arrogant in their hiring process. they very much create a one way dialog as if you should be thanking them for even interviewing you. they act like "we don't need you, you need us". it creates a very bad taste in my mouth, and even if i was to be offered employement by such companies, it is possible i would turn them down unless i am convinced that their work environment is distinctly different from their interviewing process.