if you've taken the gmatprep tests, you shouldn't have a problem with the math section. I took the test less than a week ago and I felt that the quant section was very comparable to the GMATPrep tests. If anything, the actual GMAT might have been a little easier for me, because i didn't have any permutation questions, which I'm pretty weak in. Of course, this doesn't mean that you won't have any permutation questions - I think they switch them up quite a bit so it's really just luck.
my GMAT debrief:
https://www.beatthegmat.com/came-through ... 44327.html
You will not fear the terror of night, nor the arrow that flies by day,
nor the pestilence that stalks in the darkness, nor the plague that destroys at midday.
A thousand may fall at your side, ten thousand at your right, but it will not come near you.
- Psalm 91: 5-7