I'm working my way towards the end of the PS in the OG and man, some of these questions are tough. Should I be worried that I'm lost with some of these. I'm solid up until maybe #130ish and then it goes down from there. Thoughts?
I imagine that you're aware that the questions are arranged in ascending order of difficulty.
If you want to know where you stand in quants, I suggest that you take an official practice test: https://www.mba.com/the-gmat/download-fr ... tware.aspx
Cheers,
Brent

















