So I'm just about ready to start my first practice test, and have gone through the entire Serway physics book (apparently like Resnick). The only bummer is that it didn't include quantum or atomic physics (apparently it's included in the extended version, but I didn't get it

I figure these practice questions for quantum would get me up to speed, and was about to try them when I noticed they are numbered. Are these the quantum questions pulled from GRE practice exams? If they are I don't want to try them yet and need to shop around for more quantum GRE practice material, but if they're just pulled from various textbooks I think it would be good practice.
Can anyone who has done the 5 practice GRE tests answer this for me?
Also, do Legendre polynomials show up anywhere in QM PGRE? Those formulas get pretty heavy, and there could potentially be alot to memorize there. Same goes for the Rodriguez Formula (for hydrogen atom).
Thanks,
Ari