There is no definite IQ number to qualify you to join MENSA. You must score in the top 2 percentile on a standard IQ test to be invited to join MENSA.
You must achieve a qualifying score on a paid test administered by a Mensa proctor, or you can provide acceptable past evidence from a variety of sources.
To join Mensa a person must have an IQ in the top 2% population. Mensa run frequent supervised IQ tests, and they will inform you of whether or not you are elligible to join when they send you your test results. There are a number of different IQ tests, and they use different scales. On the Cattell III B test a score of 148 is needed to join, but on the Cattell Culture Fair III A you (only) need 132.
There are no age requirements to joining Mensa, but rather IQ requirements. A person must score at or above the 98th percentile in order to join Mensa. Exception is that local legal limitations can impose an age limitation to be member of a society.
There is no public information indicating that Barack Obama is a member of Mensa, an organization for individuals with high IQ scores. Membership in Mensa is voluntary and not all intelligent individuals choose to join.
Because it is difficult for most people to understand what you are saying. That, among other reasons is why many join MENSA.
Carlos Mensa has written: 'Carlos Mensa' -- subject(s): Exhibitions
It is unknown what Robin Williams's IQ was, but he was a member of Mensa. To join Mensa, one must achieve a score at or above the 98th percentile on a standard test of intelligence, but this score ranges by IQ test. It is nearly always about 132, though.
Mensa is Latin for "table".
Mensa International was created in 1946.
Mensa Bonsu died in 1896.
In short, yes Mensa is a worldwide organization.