SC accuracy

Here are some general rules for preparing for the GMAT - especially SC:

1) Don't use accuracy as a metric - what is more important is what you learned from that question. Without knowing the difficulty level - accuracy is a misleading metric. Getting 80% on easy questions may not be great. Getting 60% accuracy on really brutal 800 level questions may be wonderful.

2) The real metric is your Official test scores - the Exam packs should be used to assess your progress. This will help because unlike the OG - you are also going to get progressively harder (or easier) questions as you work through the test. It also takes other factors such as mental fatigue into consideration.

3) You have developed enough competence to get to the last 2 answer option - the trick is to pick the right one. This tells me that you have progressed enough not to pick a random answer option - but anyone who has been studying will vouch that it is always going to get tricky as you did not pick on some error or fell for some exception to the rule.

4) Maintain an error log - it is important to ask yourself not just WHAT you got wrong but also WHY you got them wrong and HOW you will avoid making the same mistakes again. Remember none of the questions you are going to solve during practice is going to appear on the GMAT. We are just prepping ourselves to solve similar questions.

Hope this helps,