Free-IQTest.net provides a fast, free IQ test plus an IQ test score guide and information on genius IQs, as of 2015. IQ-Test.com provides a quick demo version of the Pro Certified IQ Test which helps to determine an estimate of your true IQ.
FunEducation also offers a fun, fast IQ test for both adults and children.
IQ tests are sometimes taken for fun, but also have practical uses. IQ tests are used to determine whether a child has learning disabilities or should be placed in advanced classes. They can also be used for checking a potential employee's skill relevance to a job or testing military applicants. Mensa, an international group for exceptionally intelligent individuals, uses IQ tests as part of the requirement for admission of members.