I wholeheartedly disagree with this post. One of the biggest mistakes I see students make is that they get "obsessed" with the harder material at the detriment of studying the fundamentals, then wonder why they got 20th percentile on quant. The reason, of course, is that they didn't study what they actually saw on the test.
I can't tell you how many students I've had who keep asking about ridiculous super-hard combinatorics or probability questions when they aren't yet proficient at your run-of-the-mill algebra word problem or yes/no data sufficiency...
So, to save your sanity (and that of your teacher, if you have one!), make sure that you actually ARE in the 90th percentile before you worry about the super tough stuff.
johnnycapps wrote:although you may never see anything as hard as the questions in the MGMAT challenge archive on the actual GMAT, it could only be to your benefit to have a greater understanding and grasp of the subject matter. i think that it is foolish to dismiss the usefulness of something because it may be above your ability level. for instance, you don't need to know trigonometry for the GMAT, but i have definitely used it to solve for some different GMAT problems.
Jim S. | GMAT Instructor | Veritas Prep