Alfred Binet, the founder of the "IQ test" stressed that such a test was subjective at best.
Intelligence is not quantifiable by a culturally biased test.
Intelligence is a combination of the ability to learn, and the ability to put that learning to good use. It cannot be measured by any single test.
There well may be a genetic component to intelligence, but I firmly believe that much of what we consider to be intelligence is actually an ability to retain and use memory. For instance, all children learn specific dates in history. Are those who still remember those dates three months later, more intelligent than those who did not? A simpleton can have a good memory.