Hey Fumbles,
I meant that the lady taking us through all the tests was probably taking more of a note of our appearance and behaviour etc. than she let on. I don't know how much any of that counts for, but I'd imagine if you behaved like an idiot (which nobody did) you probably wouldn't get an invite to stage 2 even if you aced the tests....
Don't worry too much about the maths paper, I'm sure that you did fine. I literally only just finished it in time and reckon I probably made a few mistakes because I didn't have time to check my answers. The timings were pretty tight and they were obviously designed to push you, I think the ability to work accurately and efficiently without panicking under pressure are more important that completing the test. I get the impression from these forums that a lot of people don't finish all of the tests and still get through.