gachu,
Depends on your strategy on how you tackle the questions on the Maths side of things. Some people will do quality of questions and actually do all the calculations, where as you may get people doing rough estimations for quantity of questions. All in all, if you manage to answer all the questions with calculations, your a genius and you shouldn't be a Pilot! More like a banker/stock broker within the time limit, after all we all can do the questions if we had an hour! Fact! Its the time constraint which kills most people, in other words you have to prioritise which questions to do!
Also the Mathematics doesn't ask to show your working, so you should guess if you don't know the answer as its multiple choice.