<p>Hey so I did all the cr questions on the bb. Is there any other reliable sources to practice cr. I find that on some prep material the cr is not that accurate. I don't mind if the problems are harder I just wanna know if there is prep material that will improve my score rather than harm it. I am scoring anywhere from 600 - 770 (I know it's really random) so I am guessing that practice will firmly place me in the 700+ zone.</p>