<p>starbucks08…your impression of the distribution of IQ is, I’m sorry to say, completely wrong. There is not an equal (or even roughly equal) number of people with each of the possible IQ values. IQ is supposed to be normally distributed (i.e. its distribution is a bell curve). The further away you go from 100 (in either direction), the number of people with that IQ decreases.</p>
<p>What I’m saying is that you can’t reason that 150 is the midway point between 100 and 200 and so it isn’t unlikely for a person to have an IQ of 200.</p>