having failed my maths test at first (by 2 marks), and passing all other parts of the assessment, I had to wait 3 months to retake, then I blitzed the maths and was offered a place. So they will not just take anyone to fill places.
True they won't take anyone, but lets face it the maths test is not exactly rocket science. Any semi competent person who does their research on the type of questions and then practices can easily pass. Even then they let you do it again anyway having seen what the questions are like so you can make sure you don't fail again!!