McGraw-Hill Education 500 Questions to Know by Test Day: Math for the GRE Test

I have the newer version of this (it was published in 2015). Less than 1 % of the answers are incorrect. I bought it because it has harder questions than most prep books. Some prep books are so easy that you can think you will score higher than you will. This brought me down to Earth by showing me what my weaknesses are.

very helpful

Full of mistakes...Only worth because the way it's organized

Thanks

lots of mistakes in this edition

I have found at least two questions where answer in the answer key is incorrect. Very disturbing and concerning considering the context and the relative ease of finding the right answer. I checked this book out from the library. Otherwise, it does have helpful problems.

The book is generally okay but there seems to be some number of (minor/obvious) errors in it which is a bit of a bummer.