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I have been traveling since 5 December (and I'm not actually back in the office until 16 December) but your teacher, Jamie, emailed me to alert me to your post, so send her your thanks :)
First, there is actually a danger associated with having extended time: your brain is going to get even more tired out because you're going to be working over a longer period of time. So that is reasion #1 why you actually do
not want to take a crack at a few harder problems with your "extra" time.
Second, you don't really have extra time. If you were approved for testing accommodations, then you were able to demonstrate that you have some condition that makes regular time an objective disadvantage for you. The extended time is an attempt to level the playing field for you - to make it "normal" for you, as it is for everyone else.
In a nutshell: you're really still going to be doing what everyone else is doing, except your timing decisions are increased by 50%. For example, you're still going to be deciding around the halfway mark whether to bail on a too-hard problem. Your halfway mark is just 50% longer than someone else's. :)
I'm going to go back to my first point: stamina. Mental stamina is a KILLER on this test, so it's very important to make good decisions about where to use your brain. The LAST thing you want to do is spend extra mental energy on a few things that are really too hard for you - for two reasons. First, there
will be consequences - you will get other stuff wrong that is easier / you know how to get right, because you're going to get sloppy later in the test if you use too much brain energy on too-hard stuff.
Read this:
https://www.manhattangmat.com/blog/inde ... lly-tests/And then look for the "outlier" part of this:
https://www.manhattangmat.com/blog/inde ... -the-gmat/(That last part is yet another reason why you don't want to spend extra time / mental energy on too-hard problems. :)