Around the age when you can comprehend how to write a proper sentence.
The average IQ of everybody of any age is 100. IQ tests take age into consideration.
An average IQ is 100. It does not matter how old a person is. An 8 year old's average IQ is 100. A 40 year old's average IQ is 100. IQ tests take age into account so that the average IQ is the same for any age.
IQ is not strongly associated with age. An IQ of 56 represents mental retardation, but nothing about the person's age.
The average IQ for adults is set at 100, regardless of age. IQ scores are standardized to have a mean of 100 and a standard deviation of 15.
IQ is non-age dependent. IQ tests can be made for people in different age ranges, but there is no average score for a certain age range. The average IQ for any age is 100.
IQ has nothing to do with age. Average IQ for ANY age is 100.
IQ remains relatively stable after the age of 5.
The average IQ of a pre-teen is around 90-110, similar to the general population. IQ scores can vary among individuals, and it's important to remember that IQ is just one measure of cognitive abilities.
When you take an IQ quiz, they first set off your IQ as 100, which means if a ten-year-old and a twenty-year-old answers a question the same, their IQ score may be different. For example, IQ 148 means your IQ is higher than 100, the average IQ for your age. In addition, IQ doesn't really relate to how smart you are. It just means how your brain reacts on some ways.
Age has nothing to do with IQ. An average IQ is 100, no matter what age a person is.
IQ is not dependent on age. Regardless of age, a person who possessed an IQ of 75 would be Mildly Retarded, or very close to that.
IQ = mental age / chronological age x 100