Going back a bit, but 1993 was quite hard. Haven't looked at it recently enough to compare to 2011, but it is probably of similar difficulty, I remember the Coroneos solution to Q8 was badly wrong!
I cannot recall exactly, would have to dig up my sisters book somewhere. (It is an ancient book now, all badly typeset etc. If I find time tomorrow I will take a photo of the page...)
I feel as tough 2008 was the easiest,
I haven't really looked at pre 2000
tests much but I have seen the Q8
that carrot was talking about and I'll
agree with him