The Preliminary SAT (PSAT10) exam and the PSAT/NMSQT exam are two forms of the same test. The PSAT10 exam serves as a practice test for the SAT exam, which is used by colleges for admission purposes. Some scholarship programs also use the SAT exam to identify candidates, but not for National Merit Scholarship qualification. The PSAT/NMSQT exam is used by the National Merit Scholarship Committee in awarding scholarships.
The PSAT10 exam and PSAT/NMSQT exam each have three sections: Reading, Writing and Language, and Math. You do not have to know facts from your years of study, but you need to analyze and reason about information given on the test that is related to your knowledge.
Scores for the total test range from 320 to 1520. There is no penalty for choosing an incorrect answer, or “guessing.”
You can find out more about the PSAT/NMSQT exam in the Student Guide on the official College Board website here.