GMAT Strategy

Hi Guys,

I had a question on how to decide on how much effort to put into a question in the middle of the exam.
Here is the scenario,
I am in the 22-26th question of Quant on the GMAT. I know I am doing ok, as the questions i see are of hard/ medium level. I have around 25-27 mins left with around 15 questions remaining.

At this juncture, i see a difficult question which is verbose. I know i can do this problem so i go ahead. After 3 mins, i am still unable to find the answer but think i am close to finding it. Will you recommend that i skip this question or still go ahead and complete it?
I see 2 choices - i am close to the answer and think this is a 700-800 level question (infact it was on MGMAT CAT). Is it worth getting this correct or guess and move on so that i can complete all the questions on time.

On my Manhattan CAT, i chose to complete the question - got it right, but had to rush through the last few questions. While analyzing the results, i found that i got a few 600-700 questions wrong towards the end.
Also, i had to literally, select an answer on the last 3 questions to complete the section.

But i am not sure, what would be a better idea in such a situation. Your inputs will definitely help. Thanks in advance!