pawan203
You're right, this is by no means an accurate way to ascertain your score. But, atleast this might just give you a rough idea.
I started this because after every GMATPrep I'll like to gauge where I am and never really understood the scoring pattern or the algorithm (who has!).
My preparation is not going as planned (nothing strange

). I'm trying to improve my CR & RC score.
One thing that helped me to raise my level steadily one after another CAT practice exam -
If my level was at 650, then I accepted that I was comfortable with all questions with levels below 650. So i tried my best to practice questions slightly above 650. (For example,
MGMAT question level 600-700 - completed all of them, practiced by section first then moved onto 700-800 questions after testing myself again)
CAT will find the appropriate skill level. therefore, if you can't master 600-700 level questions first, there's no point of practicing 700-800 level questions since in the real exam, you will constantly get them wrong at this level.