The IQ yardstick is pretty basic, 100 is standard. But anyone´s IQ can go up and down wildly over a few days of testing. It´s not a permanent, fail proof number.

Mensa was started because it was thought that an organization of the top 2% IQ of the population would make perfect leaders of the world. Didn´t work out that way, so it looks like having a high IQ, all things considered, means fuck all.