Card shuffling is one of those situations where there's a very well known and fairly unambiguously "right" answer. I honestly thought it was well known enough

Card shuffling is one of those situations where there's a very well known and fairly unambiguously "right" answer. I honestly thought it was well known enough that there wouldn't be any sense in writing an article about it, but I guess I should focus on being excited for the author for being one of today's 10,000 [1], rather than judgemental that they didn't know it before. Incidentally, this is a good reason to not use deck shuffling as an interview question. If they happen to know the right answer (which isn't unlikely) then there's no value gained in asking them. [1] http://xkcd.com/1053/ http://xkcd.com/1053/