Correct. The method of assessment is the problem in this exam. I disagree with those who say the entire subject is obsolete due to the nature of modern jet operations (i.e. you won't have to "use" anything you learn in FPL) - the subject itself covers important concepts that remain valid even when you're not doing any hard calculations yourself. That said, I wouldn't have a hope of getting 10% on this exam now.
The exam itself doesn't assess subject matter knowledge. It assesses whether your method of calculating the answers was the same as the examiner's, and whether you can do it in a ridiculous amount of time. Plenty of people who know the subject back to front and got 30%. This shouldn't happen.