Just revise math and physics. Give a look at OAA's books. I am not saying to buy it (in the case you don't want to), but just to look at the contents. What you just need is an internet connection to find the topics explained on the web (you will find something for sure). Old school books will be fine too.
OAA and other integrated schools their assessment use pilapt software and the method of compass test. I'd suggest you to use the Search button for this.