Yes, the exam quetions are weighted, especially G-NAV 1,2,3 and even I think 4 mark questions are included. The G_NAV test on weds had something like 58 questions but there were about 80-90 marks available as far as I can remember. Thats the problem with the bristol web site, each q is worth 1 mark and can skew the way you think you are performing.