Not sure how we ended up on the "Ask the GMAT" maybe this one can get moved to GMAT Strategy?
For the Quant Section:
I have to agree with Kevin and second his advice about not trying to rush through questions to make up time. As he said, it is better to guess a couple of questions that you are not likely to get right anyway, as opposed to missing several questions because you tried to rush through them.
I just wanted to add one more thought...It is tough to say that you are actually behind based on an ideal sort of chart. Jim's numbers are very reasonable, but I found myself on the wrong side of those numbers in the Quant section the last time I took the test.
My own Quant timing standard is pretty simple, after question 25 I want to have 25 minutes left right? That leaves 12 questions and 25 minutes so 2 minutes per question and one extra minute for emergencies. I find that trying to decide where I am relative to the clock much sooner than that is apt to be inaccurate. Everyone gets some problems that they can do more efficiently than other problems.
So I might seem to be ahead or behind after 10 questions when really I am just where I should be based on the questions that I have been asked and the questions that are remaining.
I found this to be true even after question 25. I was behind by about 5 minutes after 25 questions. So that seems like a problem, but over the next several questions I got quite a few of the number property sort of Data Sufficiency that can be done in 1 minute and so by the end of the test I was right where I should be.
So my advice is this...take it problem by problem and follow my two Quant timing standards.
1) If you can get a problem right, then focus on that problems and get it right.
2) If after 1 minute to 90 seconds you are not making progress on a problem then you will need to guess at that one and move on.
I have followed other experts' discussions of this topic and there seems to be agreement on a couple of things 1) Each correct answer is probably worth about 3:00 worth of your time so if it is going to take you less than that to solve the problem then do it. If it will take 5 minutes to answer then it is not worth it even if you answer correctly. And 2) after about 90 seconds your standard becomes "am I 30 seconds to 1 minute away from solving this?" If so then continue and carefully finish the problem. If not, if you are still multiple minutes away from solving, then you should probably guess.
Here is a link to an article I wrote about this subject called "Diagnose your way to success." It discuss some of these issues.
https://www.beatthegmat.com/mba/2012/04/ ... at-success