books.google.com - The Princeton Review realizes that acing the SAT Math section is very different from getting straight A’s in geometry and algebra. We don’t try to teach you everything there is to know about math–only the techniques and information you’ll need to score higher on the Math section of the SAT. InMath...http://books.google.com/books/about/Math_Workout_for_the_SAT.html?id=1_64kpwayLkC&q=prime+factors&utm_source=gb-gplus-shareMath Workout for the SAT