
Michael J. answered 03/15/19
GMAT, SAT, School Work, Bilingual English/Mandarin
Hi Shannan,
Given they were the last questions the penalty, which I don't believe there is for unanswered questions, would have been minimal (your score was already pretty much determined by the machine). The GMAT penalizes for wrong answers, essentially it bumps your score down a notch and gives you an "easier" question, but it's really getting consecutive questions wrong that decreases your score drastically. To answer your question, had you guessed and answered last two questions both wrong, I imagine you might be in the 77-80 ranged, if you'd answered both right perhaps the 80-83 range, and if one right one wrong you'd probably be right where you are.
If you don't answer a lot of questions naturally you have no chance of improving your "internal score" that goes up and down during the questions you answer and started from a baseline (400?,500?), the exact number of which I forget. Basically not answering questions means giving up your chance to improve your score, though not necessarily decrease it.
Hope this helps.
-Michael