This book is a good idea, and offers a good set of overall strategies for doing well on the GMAT, but it is full of errors, particularly in the math sections. For example, the formula that it gives for calculating the number of permutations of a set of objects (which is strongly suggests that you memorize!) is just plain incorrect. There are also errors in a number of the sample math problems; for example, in a sample problem concerning standard deviations, the demonstration of solving the problem starts off by saying "since you know that there are 100 fish...", but nowhere was that stated in the problem.
If you're a math whiz already, and can spot and work around these errors,… Read more
