Like Emily, I only had a small handful of formula questions. And I strongly agree with her suggestion to understand each formula.
During my exam, I had a question where I needed to calculate TCPI. I blanked. I spent more than a minute trying to think of it and, afraid to waste too much time, I marked it for review and moved on. When I came back to it, I was a bit calmer and had more time to think. What do I need in order to calculate TCPI? Well obviously I need to know how much work remains. How do I calculate that? BAC-EV! That's the numerator! Once I had that I immediately remembered the denominator and calculated the correct answer. But if I had only memorized the formulas and didn't make a point to understand them, I would have been lost.