Like - I get the "we're just testing basic skills" to spot people who are essentially lying. Fine, so make the test literally trivial. Read some numbers, find their mean, done.Or there's the "we want something to start a conversation". OK, so don't have an actual answer (or at least not one that is sane). Ask them to make a program that plays checkers, write it in an hour, and be clear that there isn't going to be a "right answer" in just an hour.