A GRE score that is too low for one program may be high enough to be admitted to another program. There are no universal “pass” or “fail” GRE benchmarks that apply to all schools. It is even sometimes possible to exceed a school's minimum GRE score requirement and still be placed on the waiting list or being rejected. After completing the GRE general exam, you will be given the opportunity to report or cancel your scores.
If you choose Report Scores, you'll see your unofficial Verbal Reasoning and Quantitative Reasoning scores. Due to the Analytical Writing essay scoring process, you will not be able to see your Analytical Writing score. Always remember to answer each and every one of the questions you face. Every question you don't answer reduces your overall score.
So, if you leave out three or four unanswered questions, it could make a difference of a few points in the end.