Fexysucker - Good times! Well done on getting accepted! Don't get me started on the whole 'exams accurately measuring intellect' argument, I could be here all day! I got good at exams... whether I got good at the subject is a different matter...
DisconcertingWink1 - Well done on getting your interview date through! If I were you, I wouldn't be so worried about getting a mega grade in your assessment. If I knew it was a weakness then I'd revise like you, but then if it didn't go so well I'd also concentrate on making yourself look so totally amazing in the interview (not just academically, but with extra curricular interests, confidence etc) that they'd be foolish to turn you down. Very best of luck for your interview, you'll have to let us know how it goes!
The numeracy assessment I took was all on computer, non calculator. You got scrap paper to do your workings out on, but it went in the bin at the end. All that's counted was what you inputted on the computer. The assessment was timed, but there was no time limit.
Jami74 - I found Bitesize a massive help too. Seemed just about at the right level for the assessment too. And big congrats on getting your offer letter!
RinniieX - Congratulations on getting a place!