Beyond not earning points for them, incorrect answers are not penalized on the GRE, so be sure you do not leave any questions blank (i.e., guess on questions for which you do not know the answer). You can skip and come back to questions within a section, but you cannot return to questions from a previous section once you have moved on to a new section.
Keep in mind that both the Quantitative Reasoning and Verbal Reasoning sections are section-level adaptive—the testing platform will select a second section based on your performance on the first section of that type (Quantitative or Verbal).
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