I am not fast at math by any means. If you are interested in reading my breakdown you'll get a better picture of my math background. Anyhow, I was way slower than you on math destroyer. I felt that there was no way I could get faster even after completing the entire book and meeting with a tutor. Someone here suggested DATQvault and I believe it helped me get faster. I just did all of the exams and then did them all over again. It's not as hard as destroyer but it's close. I ended up with a 17 in QR which I was very happy with. I ended up running out of time at the end and guessed on the last 3 or 4. I'm just lucky that I worked hard and learned some math anew for that score...if it wasn't for my fortitude I would have gotten perhaps a 13 or lower.