Why aren't the answers to sample exams published?

I do not publish the answers to sample exams. My reasons for doing this are not to make your lives miserable, but rather to help you do better on the actual exams. Here's my reasoning:

How should I use the sample exams?

First of all, understand that you will not be asked the same problems as those that appear on the sample exam. The sample exam is provided to give you an idea of the types of problems you may be asked. Here are my suggestions on how to use the sample exams: