Yep, Kilbaha is pretty challenging for Further Exams... [edit] Just had a look through some of my Practice Exams from school and the MAV ones also look decent, but Kilbaha is still more challenging.
The questions I find are more in depth than that of VCAA exams, or other companies.
eg.
VCAA Further Maths Exam 1 2008 Module 2 Q9
Two hikers, Anton and Beth, walk in different directions from the same camp.
Beth walks for 12 km on a bearing of 135° to a picnic ground.
Anton walks for 6 km on a bearing of 045° to a lookout tower.
On what bearing (to the nearest degree) should Anton walk from the lookout tower to meet Beth at the picnic
ground?
Kilbaha Further Maths Exam 1 2008 Module 2 Q9
A rectangular prism has a length twice the height and a width three times the height. If the surface
area of the prism is 7942cm2, what is the width of the prism?
...not sure if I'm allowed to post something from Kilbaha, just edit this bit if I'm not supposed to...
The Kilbaha could be more challenging on students doing Further Maths, if they don't have a strong background with algebra, I'd think the common Further student would find the first one easier, making a triangle and finding an angle.