<p>Hey guys. I've been using the PR book to review for chem, but I'm confused with the difficulty of the tests. Test one and two were pretty similar in difficulty, but test three was much more difficult and I scored only about 700. 1) Is the third test supposed to be as difficult as the previous two and 2) if not, which ones are better indicators of the actual difficulty?</p>
<p>Thanks :-)</p>