Graduate School in Mathematics or Statistics and the GRE Mathematics Subject Test
A similar, slightly older document with more good advice: advice and information about applying to graduate school in mathematics or statistics [pdf].
Follow the link below to the ETS website for general information about the GRE subject test in mathematics and a practice test you can download.
Click here for an old GRE practice exam [pdf]. This is the OLD math practice book (selected pages including practice exam). This isn't the "rescaled" test, so it is no longer distributed by ETS, but it's still the second-best practice exam for gaining experience.
If you plan on taking the GRE math subject test, please contact Professor Joshua Goldwyn to receive more study materials and for assistance with forming study groups.
Follow the link below to a free site for current and prospective math grad students, including posting of Q&A, advice and, perhaps most valuable, a self-reported listing of applicant profiles and admissions results.
Interested in the regular GRE exam, including the math portion of it? Check out the information about this from Career Services at https://www.swarthmore.edu/career-services/graduate-school