In general, I took the MCQ practice tests on each section in Becker until I got over an 80% reliably.
The mock exams were much more difficult than the unlimited practice test MCQs for Becker. The actual exam was somewhere between the two on difficulty. As noted elsewhere you should score higher on the actual exam than on the mock exams. I think about 10 points is typical. There is a great post about this on here already.
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