@jstay, I have taken a few 50 question and a few 100 question progress tests in the last week, and I am scoring between 94-100. I have DEFINITELY seen every single question before, though, so I don't put too much stock in my progress tests scores. However, I know the concepts and think I could answer correctly if I saw a similar question, so that's mildly comforting. On the second practice exam, I averaged the same score, 77%, but just like you, on the Sims, I entered “0” for blank cells, and also put ( ) around negative answers and it counted me wrong!! I didn't go back and recalculate, I just moved on with studying. I think we're going to do great! 75….all we need.