The organisation is named after the Latin word for table, denoting a round table where all members are equal.
Members of Mensa are invited to exclusive lectures and seminars and can attend local meetings and networking events.
The test gets progressively harder as the questions go on.
You have to be at least 10 and a half years old to take the supervised test, younger applicants need to be assessed by an educational psychologist.
It's a mix of language and number-based puzzles. Admittedly, this one made no sense to us.
The first test, Cattell III B, has 158 questions. The second paper, Cattell Culture Fair III A, has 50 questions and is mostly diagram-based.
The youngest member of Mensa was invited to join when he was just two years and four months old. The oldest member is 104.
There are 120,000 Mensans in 100 countries. Just 1,500 of them are under 18.
The answers are below. How did you do?
