Comprehensive Prep for GMAT Math. Every year, students pay $1,000 and more to test prep companies to prepare for the math section of the GMAT. Now you can get the same preparation in a book. Although the GMAT math section is difficult, it is very learnable. GMAT Math Prep Course presents a thorough analysis of GMAT math and introduces numerous analytic techniques that will help you immensely, not only on the GMAT but in business school as well.