OK, the level of maths needed is nothing a 13 year old schoolboy couldn't do. If you can rearrange V=IR to find R=V/I then you're there already. General Nav shouldn't be taxing if you remember Pythagoras' theorem and basic trigonometry. I could go on but you get the picture. As Scroggs, and most except a320rider said, the problem is not the difficulty level of the questions but the breadth of the syllabus. Often it's more a memory test of obscure facts than an exercise of mental agility.
bfato (B.Sc Management Science)