<p>So as you know classes in college have numbers attached at the end, like Math 55 or Chem 331. What do these numbers mean and how do you tell the relative difficulty? Do they differ from school to school?</p>
<p>So as you know classes in college have numbers attached at the end, like Math 55 or Chem 331. What do these numbers mean and how do you tell the relative difficulty? Do they differ from school to school?</p>