Hi ramus123,
Many Schools publish 'class profile' data, including information on average GMAT Scores, "middle 80" Scores, etc. Do you have any of that data for this specific Program? We'd be better able to assess how this Score might measure up if you did have that information. A Q27 might be seen as a 'red flag' at certain Programs, so retesting (with the goal of raising that Quant Scaled Score) is a reasonable idea - although it might not actually be necessary.
Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs/mocks (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) What is the application deadline for this Program?
6) Are you planning to apply to any other Programs?
GMAT assassins aren't born, they're made,
Rich