Just out of curiousity, anyone know how many questions on this thing are actually scored? (because of the existence of experimental qs)

The introduction of Kaplan's Qbook says there's 30-35 experimental questions.

Are these experimental questions regular/new questions that they are looking to categorize (i.e. easy, moderate, hard), or are they the random random ones that pop up (and are usually hard, like some weird tRNA)?

Are these experimental questions regular/new questions that they are looking to categorize (i.e. easy, moderate, hard), or are they the random random ones that pop up (and are usually hard, like some weird tRNA)?
Most of them are pretty obscure, but some are straight forward.