Do you dare to find out how smart you really are? Mensa's new brain test mobile phone app for Android, BlackBerry and Windows phones and is already out on iPhone, will unveil your true IQ.
The official American Mensa Brain Test app uses Mensa-approved questions to test your problem solving skills, using logic, mathematics, language and visual tests.
Mensa is the worldwide organisation for people with IQs in the top two percent of the population.
The app has 20 short questions, 40 medium questions and 60 long questions which won't get you into Mensa, but should make for some great brain exercise.
Mensa Brain Test users can post their test score certificate to Facebook, and check their improvement through a local score table.
American Mensa executive director, Pamela Donahoo, said: "The app is a great way to train your brain and we hope to see app users at our Mensa Admission test sessions in the coming year."
When you have completed all the questions, you will be given your personal test certificate, allowing you to gauge whether you might have what it takes to join Mensa, and the top two percent of the population.
Online discussions suggest you avoid putting any mention of Mensa on your CV if you want to get hired, however. On the social networking site Linkedin, some users suggest that managers discriminate against Mensa memberships, and that it could be considered intimidating.
Mensa was founded in England in 1946 by Roland Berrill and Dr Lance Ware, to form a non-political society for bright people, free from discrimination. The only entry requirement is a high IQ. Mensa has 110,000 members in 100 countries around the world.
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Take a look at some surprising Mensa members in the photos below.Suggest a correction