Oh, you were so close! According to your answers, it looks like you have a solid foundation in math, however, you missed this one problem. Solving a quadratic equation is tough, especially when you have to complete the square. Volume 5 can teach you to easily solve these types of problems. If everything has been easy up to this point, then you can start with volume 5 of the Learn Math Fast System.
RESULTS: The end of 10th Grade Level, however, the Learn Math Fast System is for all ages. Volume 5 covers 9th - 10th grade algebra, but there is no mention of grade level within the books.