In general, test-takers are expected to answer ~7 Q questions in 15 minutes and ~8 V questions in 15 minutes.
At all costs, try not leave any answers blank. If necessary, guess if you have to - at least you'll have a 20% chance of getting the answer right. If you can eliminate a couple choices, then your chances increase. So if you have 2 minutes left on the test and have 10 questions left, you'll have 10-12 seconds per question to make an educated guess; don't forget about the extra time it takes to "confirm" your answer as well.
Here are some ideas when guessing on V:
<b>CR:</b>
1. Stay within scope
2. For inference questions, pick the most obvious answer
3. Avoid extremes
4. Watch for answer choices that are the exact opposite of the intended question
<b>SC:</b>
1. Make sure each pronoun has a clear antecedent
2. Verify whether the subject is singular or plural
3. Look for splits (based off items 1 & 2)
4. Active tense is preferred over passive tense
5. When in doubt and in desperation mode, pick the shortest answer
<b>RC:</b>
1. For inference questions, pick the most obvious answer
2. Avoid extremes, exaggerations, and offensive words
3. Vague words (usually, sometimes, maybe, may, some, etc.) are better than unequivocal words (always, everybody, all, never, etc.)
4. When in doubt and in desperation mode, pick the answer closest to either the intro or conclusion (with more emphasis on the intro)
RC is probably the hardest section for me because the passages are so dry and boring. Try to become an active reader and, for those 3-4 minutes, pretend you <u>love</u> the topic.
Lastly, I'm not a fan of canceling a test score because it basically wastes $250. However, if you're in a situation where you didn't get to finish ~7-10 questions in a section, I'd cancel the score.
Good luck!