Approachable solutions for two official GRE mathematics subject tests–the GR0568 and GR9768. The booklet comprises 84 pages of solutions and a 12 page glossary. The purpose of this booklet is simple: To assist students study. Solutions have enough detail to aid those struggling, however the design is such that it is usually suitable as a reference. All major theorems are stated either within the primary text, glossary, or both. In particular, great pains were taken to include theorems from Calculus and below. The whole thing is written from an intuitive standpoint. Graphs are used extensively, and geometric arguments are incessantly utilized. Constructive solutions are given on every occasion conceivable.