The three most popular IQ tests known today are the Stanford-Binet Intelligence Test, which is the U.S. version of the Binet-Simon test, the Wechsler Adult Intelligence Scale (WAIS), and the Wechsler Intelligence Scale for Children (WISC). The official IQ test is an assessment designed to evaluate intelligence via five key cognitive facets: fluid reasoning, knowledge acquisition, quantitative reasoning, visual-spatial processing, and working memory. It takes into account both verbal and nonverbal responses. Each of these five facets is assigned a specific weight, and their cumulative score is typically consolidated into a ratio widely referred to as the intelligence quotient, or IQ. https://officialiqtesting.com