What is the Probability that I'd Get into Mensa?

Hm, out of curiosity I looked for a quick online Binet-like test, and took one at http://www.intelligencetest.com/

It was a surprisingly simple test, got 30/30 right and got a score of 144. Funny enough, that qualifies as “Gifted”. To be a “Genius” it says you have to get >144. I guess you gotta be a “Genius” to figure out how to get more than 30 questions correct in a 30-question test.