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# How many people worldwide are known to have the maximum possible Intelligence Quotient, which is 200?

Question #82707. Asked by 24and48fan. (Jun 29 07 12:58 PM)

This site states one in a million have a IQ above 174.

http://www.geocities.com/rnseitz/Definition_of_IQ.html

 Jun 29 07, 1:11 PM
miffy42

I do. (possibly)

 Jun 29 07, 1:14 PM
Baloo55th

The maximum (and any individual's score) depends on which test is being used. Some are closed scales, others not. And having both sat them and marked them, I don't really trust them. I've been told I clocked over 160 on one, and 'off the scale' on another (and unofficially that I had the highest IQ to go through my school - a very minor English public one - but there were many that got better exam results, but that might have been because I didn't work very hard). Can't tell you which - don't know by this time. Despite their best efforts, there is a lot of cultural baggage in many tests, and the actual intelligence may not always show in these tests. I quoted my 'measure' not to boast, but to show I'm not suffering from sour grapes due to a low result.

 Jun 29 07, 2:03 PM
zbeckabee

Using the current world population of 6.5 billion -- the IQ of 200 being equivalent to 6.666 standard deviations above the mean -- one can easily derive that the expected number of persons having an I.Q. of 200+ to be .085 or less than 1/10th of a person (per normal distribution of I.Q. scores).

http://sci.tech-archive.net/Archive/sci.math/2006-06/msg00571.html

 Jun 29 07, 5:38 PM

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