well done !
As someone else has already said, the questions sometimes have more to do with English comprehension. One question I had on the quadrantal rule ran to about 5 lines of information from which you had to build a mental picture. Aha says I, let's break the problem down to derive the answer using only the relevant information. After some scribbling, I got the right answer from a numerical perspective having added grid to magnetic heading, sorted out the regional pressure etc but missed the magic letters FL buried deep in the question.
My answer .....3500 feet on regional QNH. Correct answer ........FL35.....which was the only answer given as a flight level hence the working out from first principles was a waste of time
What other exam pitfalls are hiding out there in nav, perf & planning etc. ???????