I do 2U and in the trials, I did my maths test and finished with around an hour to go (minus q10). You can say that I rush through the whole paper, but I would spend the last hour to go over the whole test again to look for any mistakes and obviously finish the last question. I did pretty good and this was done by constantly working through past papers with this specific time management. Idk, it works for me but it might work for others too.