What does it matter, the IQ test simply measures how good you are at doing IQ tests.
There are a number of different methods which purport to measure intelligence, the most famous of which is perhaps the IQ, or 'Intelligence Quotient' test. The 'Stanford-Binet Intelligence Scale' began life in early 20th century Paris, as part of Alfred Binet’s efforts to educate children with learning difficulties. Those that obtained a score below their age were considered "retarded".
IQ is a 'psychometric' test, meaning it measures mental ability. However, defining intelligence is far from simple. There are two main schools of thought. The first believes in an inherited, genetically determined intellect that can be measured. They tend to follow the school of IQ tests.
The second group of psychologists believe in many intelligences, the development of which may be the result of our social background. They also think that measuring these intelligences is also problematic.
The modern day IQ test measures a variety of different types of ability such as verbal, mathematical, spatial, memory and reasoning. The test is then 'pre-tested' on a group of people representative of the wider population. Then it's graded so that the majority of people will be get between 90-110.
When graphed, this is a curve in the classic 'bell' shape where most people are distributed around the average intelligence (or intelligence score) and few people are at the extreme ends of low and high intelligence.
So you have people spread between 0 and 170 IQ scores. 25% of the population will be in the middle. with only 3% of the population having a score of 150% or 30%.
about 7% of the population shares your score, and you are in the top 25%. I was tested at 145, which I did for a partner once, but she turned into a bit of an IQ snob, and I decided to let her move on away in her own narrow minded direction.