I just took the College Mathematics Clep test today. I found the Petersons Clep Success book online for free. I thought that the practice questions in it were a little harder than the questions on the actual test. I finished the clep test 20 mins early. I ended up getting a 74. If you can get 50% on the Petersons 8th edition clep success book; I think you will be able to pass the Clep test fairly easily.