Here’s another set of video explanations (one math, one verbal) of practice problems found in ETS’s Paper-based Practice Test for the Revised GRE, a PDF released by the test-makers themselves.
You can find the whole set of explanations for every practice problem here. Enjoy!
Math: Section 5, Question #20 on page 78 that begins: “Of the retail sector’s 1991 contribution to the arts, 1/4 went to symphony orchestras and 1/2 of the remainder went to public television. Approximately how many million dollars more did the retail sector contribute to public television…”
Verbal: Section 3, Question #20 on page 57: an RC question on the passage about brain processes that begins, “Based on information contained in the passage, which of the following chains of events would most closely conform to the classical conception…”