"Traditionally a good score is "double digits" (10 or better) on each test, and a score of at least "N" on the essay. You can get into medical school with lower scores, depending on the rest of your application and on the medical school. For your state medical school, a total score of 27 or higher, with no individual score less than 8, is probably sufficient. It is important to have a well balanced MCAT score, with no individual score markedly lower than the rest of the test. For example, a score of 8,8,8 (total 24) is generally considered superior to a score of 10,10,5 (total 25)."
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I took the PCAT and I'd assume it is the same. There is no minimum. I think they just use it along with GPA and everything as a guide to your overall knowledge.