The book contains more than 800 problems that will provide you ample practice to develop necessary habits and skills to tackle the GMAT quantitative section... and WIN. Perfect for use as additional practice material in your preparation for the Quantitative Section of GMAT. The book consists of the following parts: A. References B. Tests C. Explanations We believe that predominantly our problems are more difficult than those in the original GMAT because we have found that students who practice on harder problems pass the test much more easily and with higher scores than others.