Presuming that you are only going to have one more test (or quiz, or assignment, whatever) and that all five of the scores have equal weight, then use the fact that the total of all five scores must be at least 5 times 93 in order to have a 93 average. Add up the scores you already have and subtract that sum from the product 5 times 93.
John
My calculator said it, I believe it, that settles it
