Maths
Hi Andrew
Don't worry to much about the numbers, but you can always do mental maths for practice.
If you drive, every time you pass a mile post to a city/town work out how long it will take you at your currents speed. Look at the fuel how much do you have in the tank then divide it by your estimated fuel consumption.
It only takes practice and soon you will dreaming maths problems aswell.
As for the maths needed for the course make sure you understand TAN COS and SIN and how to apply them. And then make sure you can use your calculator.
RGDS