Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A great warm-up!

This book is perfect for those who have a) not had a math class in a while or b) little confidence in their math skills. As one of the mathematically crippled myself, I felt I needed a brush up on my skills. This is a great entry-level book with wonderful step-by-step instructions, both of methodology and practice problems.This is a "leg up" book, though. You definitely need to couple this book with more advanced practice to be successful on the GRE. Try the Barron's comprehensive study aid.