The above IQ tests consist of different types of questions, each testing a different component of intelligence. Usually the following components are tested:
• Verbal intelligence: the ability to understand, use and learn language. Quick understanding of text and a large vocabulary are indicators of a high verbal intelligence.
• Numerical intelligence: the ability to calculate. Calculations are traditionally the most commonly used method of measuring intelligence.
• Spatial intelligence: the ability to solve complex spatial problems.
• Logical intelligence: the ability to reason.
