Icepilot
Are you a gambling man?
If you are then by all means learn all the answers without knowing why it's the right answer.
If you want to play it safe then I suggest you learn WHY the answers are the answers.
If you are lucky you could pass all your exams on your first sitting if you try throwing the dice. The next sitting you could fail all of them for doing the same thing.
You say you've read the syllabus, do you actually understand the syllabus though?
Good luck.