I went from the low teens to +90% in two weeks. Studied while traveling and then the last week (Friday evening - Thursday morning) i moved into the +95% range. I started taking tests at lunch on Thursday and then took 13 exams from thursday evening and friday.
I was going to take the test on Monday evenng, but after those 13 and no fails, i walked into a testing session on Sat morning at a local hamfest. I passed with a minus 8. Not what i wanted to do, but its offical. I show a total of 60 hours for all three with the last 25-ish hours on the Extra.
The Sat test was "a last minute thing", i figured out that what the hell, give it a shot. I am glad i did, as i did not take the whole weekend studying to hit the upper >95%. I am more than satisified with my 84% thank you

Give it a shot. I told the wife, that right after dinner i was locked in the shack and there would be no sharing fav TV shows or walking that week. She was cool and i am glad i did it.
The tech and general i did every math problem by hand. I was proud of that fact. After getting my Gen, i used only the freq in meters/2 to make a 10 M dipole. That was it.
So for the Extra, I made the choice to NOT learn the formulas. Being an engineer, the polar coords were pretty simple to memorize the right answers dependng on whether the values were positive or neg. the other math questions were simple enough to memorize by using keywords in the questions and associate the answer.
I make no appoligies for this method! I figured i would never be in an instance where remembering the math in my head would "save my life". There will always be the books and my programmible HP caculator oor a web app IF i ever needed to really use that material.
I took in the caculator to the session, but never turned it on.