On: Your IQ isn't 160. No one's is. Stratospheric IQs ...

[Takennickname]

You're assuming that IQ sees linear growth. Getting from 100 to 110 is much easier than 140-150. It's not just "10"

[s1artibartfast → Takennickname]

It is literally a normal distribution, not linear. This means that the higher you go, the number of people above a threshold drop off in a non-linear way.

[HDThoreaun → Takennickname]

I don't think you understand what IQ is.