>>33255352 (OP)MCQ exams invariably leak considerable information about their answers through shared constraints. The more thorough the exam the more info they tend to leak. Basically mark only the answers that don't conflict with answers for other questions; if you can reduce the set of possibly correct answers for a question down to 2 then mark one, if you can reduce it down to 1 then you're gold. If they reduce down to 0 then you need to reconsider the other questions, somewhere you've mis-calculated the inter-question constraints. I aced many an exam about which I forgot to study using this method. Though it helps considerably to have been utilizing this technique since childhood, practice making, as it does, perfection.
