I tested out out of both Clinical Calculations and Medical Terminology. The Clinical Calculations test was not super-easy, but it was not super-hard, either. It's mostly a matter of practice. I spent 3 weeks practicing problems every day with a workbook and the test wasn't so bad. There was only one tricky problem, I thought. The Medical Terminology test was an old final from one of the classes. It was very fair, but not super easy.