My instructors drilled in to me the following:
RTFQ - read the f****** question
RTFA - read the f****** answer
I thought it wa very harsh, until i faile dmy air law a second time. My 3rd attempt i done exactly what they said a few times over. I was amazed to see how many questions seemed ambiguos, but after reading them over and the answers it started to become very clear on the actual answer.
I personaly thought it was a very sneaky paper. If you have the minimas, signals and maths for pressure settings in you head you should be good to go.
Just be very carefull on what you interperate in the question.
Good luck.