Well if you believe the name of the airport, then Nottingham is the area around EMA
However this isn't the case, its not even in Nottinghamshire. But that's a different story. Castle Donington, Kegworth etc are areas surrounding the airport. I live in Nottinghamshire and it takes me around 45 mins max to get there. Nottingham, Leciester, Derby and Birmingham will all be within the 90 mins rule.
I would ideally like EMA, but if MAN were possible I wouldn't mind being based there.
ib16uk........ don't worry too much about the maths testing. All you can do is practice the example questions and I imagine you will be fine. I had an interview with Virgin a couple of years ago and the tests seem very similar. They are not trying to catch you out as such, I guess its their way of reducing numbers..... after all they can't interview everyone