Arial or Helvetica?
OK, you typography geeks out there will apprciate this. We all know that Helvetica has been around for a long time and is very popular, and Microsoft ripped it when they created Windows and called it Arial. The inferior typeface is now installed all over.
But can you tell the difference between Arial and Helvetica? It's not easy, that's for sure. I got 6 out of 10, and I know how to look at this kind of stuff. If you want a really in-depth article about the differences between the two typefaces, read this article. Just don't read it until after you've already tried it.