I'd been saving these questions for the Genesis Trivia Quiz thread, but that seems to have stopped getting posted to, and I wasn't likely to get a turn anytime soon anyway. So here they are. These don't call for any inside knowledge or anything; the answers are just mundane things that I've observed.
(1) Among Genesis studio albums, what is only true of their first 3 (FGTR / Trespass / Nursery) and their last (CAS)?
(Hint: This is technically true of every band's first album, but Genesis's has a better claim to this than most.)
(2) Among Genesis studio album tracks, what is uniquely true about "Los Endos" and "No Son of Mine"?
(3) Among Genesis studio album tracks, "The Serpent" represents one extreme and "A Trick Of The Tail" represents the other. What are the opposite things that are true of these two tracks?