Knowledge about air duct cleaning is in its early stages, so a blanket recommendation cannot be offered as to whether you should have your air ducts in your home cleaned. The U.S. Environmental Protection Agency (EPA) urges you to read this document in it entirety as it provides important information on the subject.
Historically, IQ is a score obtained by dividing a personâs mental age score, obtained by administering an intelligence test, by the personâs chronological age, both expressed in terms of years and months. The resulting fraction is multiplied by 100 to obtain the IQ score.
How an IQ Test is Scored. The term IQ actually stands for intelligence quotient. To determine a person's IQ, a person's mental age is multiplied by 100 and then divided by the chronological age. The average IQ is said to be 100, so anything above that is considered above average. The range of what is considered developmentally disabled is thought to be anything below 70. Most people who are considered geniuses have IQs above 145. What an IQ Test Does Not Measure.