OP here! Wow! I didn't really expect this to be posted, but cool that it did! I thought I might explain myself a little (although it does not make this less stupid). This actually occurred a few months ago on a final exam that was marked by an outside examiner. Thankfully the final grade also took another exam and an assignment into account, so I still got the final grade that I had expected (and actually completing the question is unlikely to have improved the grade). Before the exam started, we had five minutes to read through the questions, and I only got to read until question 9, so when completing the questions afterwards, I completely forgot to check the backside of the examination booklet (where question 10 was located). I know it was my own fault, but I am always really nervous - almost panick-y - when it comes to exams. I felt absolutely terrible afterwards, when I realised my mistake, but there was not much to do, as the exam was over by then. Thankfully it all turned out alright anyway. Thank you for all your feedback! I have been reading through all the comments and I appreciate what you have to say - even when you say "YDI", because I know I do. It was not very clever of me ;-)