Tips on how to ace every test:
#1 Always bring a coin. I cannot stress how important this is. If it is a true or false question and you have no idea, your best chance is to go with complete randomness.
#2 The longer the answer the better. If there is a question that you are not quite sure about, just keep rambling and hope you hit all the points.
#3 Do NOT study. Studying for tests makes the whole experience boring. Its way more fun to stitch what little you know about the Napoleonic wars, to answer a question about the velocity of a canon ball. You are a detective and the murder you are trying to prevent is the death of your grades.
With these three easy tips you are guaranteed to ace every test. As long as you bring the deck of cards.