It was 66 questions. The rescaling should only affect your score (on a 990 scale) not your percentage (for obvious reasons). I wouldn't worry too much about the rescaling to be honest. The point is to help institutions distinguish between scores at the very top of the heap. In the old test, I think a score of 990 put you in something like the 93rd percentile only, so institutions could not make any determinations on a finer scale.I actually have taken both the original, and the rescaled, version of the math subject test. My percentile score fell over 10 points between the two, but then again I've been out of school for a while and my brain has suffered from "software rot." My sense is that universities - especially in computational finance, applied math, and operations research programs - are willing to overlook a soft math subject GRE if the rest of the application is good and there is compensating work experience.