We *all* sometimes have problems understanding what the problem is saying - it's not just because you're not a native speaker. :) They're deliberately writing some questions to make that difficult.
In the moment, there's really nothing you can do. You don't know how to do it and you can't come back to it later or look something up or ask someone or anything. The only thing you *can* do is make sure that you don't lose time on that problem.
For a quant question (average 2 min), you've got roughly about 1 minute to figure out what's going on (and then 1 remaining minute to do the needed work). If you really don't know what's going on by that time, then you should switch to educated guessing for 30-45 seconds, and then you should move on.
NEVER spend *extra* time (above the average) on any question that you're struggling to understand in the first place. Cut those off faster.
Have you read my time management article yet? That's what you do. :)
By the way, the below article talks about this issue in general: how they try to disguise what's going on and what we can try to do about it. Note that what we can try to do takes place during our study time - that is,
ahead of time, what we can do to learn to think how they think in the first place. In the moment, while the clock is ticking, it's already too late. Nice shot - they got me.
http://www.manhattangmat.com/blog/index ... -Problems/