Original sentence: Mensa is used in Spanish slang to mean "stupid", and the word menso (feminine: mensa) means "jerk" in parts of Latin America.Mensa's only requirement for membership is a measured intelligence level in the upper two percent of the population.When someone says that they were "invited to join Mensa," what they really mean is that they submitted their IQ test results, and their signed application for membership had been approved, so they were being "invited to send a check to Mensa" if they wanted to join.Worldwide, about 120 million people qualify for membership, of whom only 100,000 (0.08%) have joined
Edited sentence: Mensa sets a measured intelligence level in the upper two percent of the population as its only requirement for membership.The word menso (feminine: mensa) means "jerk" in parts of Latin America,  and the word mensa is used in Spanish slang to mean "stupid".Worldwide, about 120 million people qualify for membership, of whom only 100,000 (or 0.08% of those eligible) have actually joined the organization