I failed at feast! I found the majority of it extremely easy compared to the military ATC aptitude tests, but it works so if you fail one section then you fail the whole test and one of the sections I've never really been good at and knew I'd failed as soon as I finished it.
The multiple choice was also very easy, I wouldn't fret just have a decent mental maths brain, read the booklet through and through and also knowledge of distances to other countries was beneficial!