Since the IR section is not adaptive (at least not yet), this is really about maximizing your 'raw' score. If you think you can get a question right -- I'd get it right. If you think you are unlikely to get a question right (or feel like you might get it wrong)... I'd consider moving on to the next one if time is a big issue.
Just my $0.02.
Brian Lange | Manhattan GMAT Instructor | North Carolina
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