u can calculate wid the formulas taught
probably a 9
i havent taken the psat, but i have the sat, make sure to bring some snacks, because youre in there forever, 2 sharp number two pencils, an sat approved calculator, and maybe a jacket. your phone and any books will be taken up, so don't try to bring them(but they will be given back at the end of the testing). good luck! i hope you do well!