In one experiment, the researchers divided the brain into several regions, and then scanned and compared the gray matter content of each region of the brain. The results showed that people with high scores on the IQ test had brains that were lower than those with lower scores There are 24 areas with more gray matter content, and most of these areas are responsible for various functions such as memory, response and language. From this text, we can deduce:. ['People with low IQ do not have gray matter in the brain.', 'People with more gray matter in the brain have higher IQ.', 'Smart people have gray matter in 24 regions of the brain.', 'People with high IQ have strong memory, response and language skills.']