If you liked that question, check out the Self Referential Aptitude Test: http://faculty.uml.edu/jpropp/srat-Q.txt
I must of miss-stepped somewhere because I think I proved the answer to Q8 was C, so Q3 and Q4 had to add up to 6, but Q1 says Q3 or Q4 has to be B, and they can't BOTH be B, because of Q2. So I'm stuck! I've done something wrong.
Maybe I'm reading one of these questions wrong? Rats.
edit: oooooops, C is 2 away from E.