What shall I work on in Math?

<p>I am about to take the ACT on April 13. I also took an ACT on Feb 9th in which I got a 27 :(
I didn't have enough time for Math, Reading, and Science. I feel that this time I am much more well paced in Reading & Science although I depends a lot on the kind of test I get.
I scored a 26 on math last time. I strongly feel like I can achieve a 30. The problem I run into is that I know all the main concepts in qs 1-40. But as soon I hit 40-50ish, I start missing questions.
Can you high-math-scorers provide me with some insights or patterns you see in them. Are there any concepts that are usually consistently tested in qs 40-60?
Thank you!</p>