Take free IQ tests or the officially certified online IQ test of the International High IQ Society. 38 fun questions will give you a free, real IQ score in just minutes. An intelligence quotient is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. IQ Test Information An IQ test seeks to measure an Intelligence Quotient (IQ) or a person's mental age. 20 questions from a real IQ test.