I don't use FB so apologies if this is actually something from about three years ago:

http://www.news.com.au/lifestyle/health/mind/can-you-solve-the-intelligence-test-thats-sweeping-facebook/news-story/27981be57c7e02a711ddbc9502ac3501

"People claim that anyone who understands the enigma has an IQ of 150, which is considered to be in the top one per cent of the population and ‘genius’ level."

WARNING: solution is given at bottom of the story.

Genius roll call in the comments (bonus IQ points if you don't use FB)