GMAT Verbal & Essays

There's a style and logic to the hardest real GMAT Verbal questions that prep company questions do not replicate. I would not advise you use any questions for practice besides official ones.

It can be very difficult to improve in Verbal once you're near the top of the scoring scale, but that may not be true for you if you haven't invested much time in Verbal prep. At your level, if you can turn just one wrong answer into a right answer on test day, that probably will mean a 1 point improvement in your Verbal score, and a 10 point improvement in your overall score. So the effort is likely to be worthwhile.

It may be the case that there is a particular grammatical issue you're not sensitive to in SC, or a particular logic issue you're not attuned to in CR. You should answer batches of official questions, and analyze your mistakes. Be particularly mindful of any patterns in your errors - if you make several mistakes in SC questions testing modifiers, for example, then you'll likely improve a lot by better understanding how modifiers work. It's difficult to give any specific advice without knowing what types of errors you're making.

It's usually the case in very hard questions that you need a perfect understanding of the meaning of the question to get a right answer. So in the hardest SC questions, for example, unthinking application of grammar rules won't generally get you to the right answer. You need to understand what a sentence is trying to convey, and how the underlined portion relates to the rest of a sentence. You'll become most aware of issues like these by practicing from official questions.