D363 is the longest OA ever
It was so long I ended having to take a bathroom break, which Ive never done.
Also, I learned something today. If you take a break and you've skipped previous questions, you are not allowed to answer anything skipped upon return. It makes sense but again, I've never had to take break so it was kind of an oh shit moment.
Anyway, I cannot stress enough, practice, practice and practice calculations. The time needed on the calculations pretty much dictates the entire test.