We really need to start teaching this in first grade if kids are ever going to understand this by high school. Not everyone shared Mr. Chen's view about the necessity of adding Perl to early elementary curricula. Even experienced programmers are frightened and confused by it. The Perl lobby is just getting too powerful, and they need to be stopped. This is similar to other Purity Tests, of which perhaps the most famous is the Unisex, Omnisexual Purity Test that can be found in soc.singles.
Additions are welcome.
When finished, subtract that number from the total number of questions, then divide by the number of questions to get a percentage. This percentage is your perl purity. There are 125 questions in this version.