Rate your SEO skills with these Quizzes

Did you know, for high-volume search phrases, the Search Engines usually will NOT differentiate between singular and plural versions of a term? Check it for yourself by seeing the search results on these phrases - cell phone vs. cell phones. I was under the impression, until I took the SEOmoz quiz, that this was a case of stemming & there should be differentiation.

Here is my compilation of all the interesting SEO Quizzes I have found (work in progress) -

• SEO Expert Quiz - the 75 questions there will take about 30 minutes. The answers to a few questions are debatable but the quiz is educative nevertheless.
• SEO Professional's Litmus Test - 11 Search Engine Optimization Questions & Answers  for newbies.
• Google WebMaster Quiz - 40 Q&A based on issues commonly seen on the Google Webmaster Help Forum.
• StackExchange Pro Webmasters - although not really a quiz, you can follow the hottest Q&A that have got the most votes

Trivia: PageRank is actually named after Google co-founder Larry Page