IQ isn't a reliable meter to test either intelligence or smartness.
IQ is a real American/western thing, I often refer it as a brag-meter, instead IQ meter.
IQ test all relate to where you grew up (1st,2nd or 3rd wold), what you did on education and what you are taught in life.
For instance a head of tribe somewhere in the central parts of Africa can have the same intelligence or even a higher intelligence than a business man in America.
If you let them take a IQ test, it guaranteed that the African guy scores lower, that the guy from America.
That is mearly an example.