IQ (Intelligence Quotient) is people's ability to understand objective things and use knowledge to solve practical problems. Observation, attention, memory, imagination, analytical judgment, thinking ability, and adaptability are the seven abilities that make up IQ. IQ is usually used to identify a person's intellectual development level. For teenagers, acquired education and life experience are very important to improve IQ. It discusses the secrets and methods of improving teenagers' IQ from the aspects of being good at observation, smooth analysis and reasoning, enhancing logical thinking, cultivating imagination, and improving memory. As long as you develop your intelligence with a positive attitude, you will succeed and achieve great things like successful people. I hope this book "IQ: 46 Secret Rules for Super Development of the Whole Brain" can inspire and benefit young people.