You can, but your performance is going to drop, and that will also cause your score to drop. A better plan would be to fix any timing issues you're having earlier in the section so that you do actually have the time to address the questions at the end of the section as well.
So what's going on with your timing? Use the below article to analyze a recent MGMAT test and then come back here and tell us your analysis (not just the raw data - the actual analysis, too, please!):
http://www.manhattangmat.com/blog/index ... ice-tests/Also, read this article on timing and start doing what it says:
http://www.manhattangmat.com/blog/index ... anagement/