Phase 2 mathematics are more than easy. The only thing you have to be able to do is being able to divise and multiplicate with a pen and a paper (I know it's a long, long time ago but it comes back pretty quick).
15 minutes is really enough, I bought Speed mathematics and must avoid that the book is fantastic and really interesting as you learn some incredible way to calculate in less than 10 seconds 95X102.......But this is totally useless for the phase 2. This is my point of view.
Please do not worry about the maths, even if you read :"give the cube root of 125....." Just have a look at the results it's obvious.(5X5X5=125)
The pilapt is really much more stressful as it starts by the deviation indicator. For those who downloaded the pilapt test, be advised that both of the Deviation indicator are wrong. On D-day you will have to push it right to bring the cross on the right and left to bring it back left....seems obvious I agree but I was quite surprised.
I'm on phase 3 in 8 days, but if successfull.....No course before November!!!!
Enjoy, try to relax, those people from CTC are really nice.