I thought the connections between the riddles and the answers were no-brainers, but I think I would have been seriously tripped up by all the valid possible answers that come to mind, at least with the first two. I had an exam like that last semester, where the questions were multiple choice and even if you knew all the information the right answer wasn't obvious -- and you could have argued out all the alternatives lucidly in an essay, but you don't have the luxury of that, you need to give one short answer and hope you picked right. The idea that you can know enough and still get it wrong is pretty scary in and of itself. And I didn't even have a crowd surrounding me with bated breath and Turandot glaring at me.