I think that the OP is correct in theory, but wrong in premise. Sure these exams do have simple answers, but the main thing that makes them a joke is not that they are "easy", but the roundabout way in which the answer the questions.
Just look at the examiner's report from all of the science exams, you see with almost every question that "students failed to read the question". Well then, they should make it easier to understand what they actually want you to write.