Maths and Physics can always be improved by practice, here's some practice for you from The Cabair website. The Cabair Maths and Physics tests are identical to these practice tests and infact most of them were the actual test questions.
http://www.ccat.org.uk/fw_assessments.htm.
When it comes to the PILAPT tests I wouldnt recommend any preperation, the instructions are clear and you have time to practice what needs to be done before each test is complete. The calmer you are the better you'll do I'd say.
I did the tests last year and with the above preperation I was accepted to the Cabair Integrated course.
Hope that helps.
MrScottish