Answer:
The formula was: IQ = Mental age ÷ Physical age × 100. No matter what the child's chronological age, if the mental age is the same as the chronological age, then the IQ would equal 100.
Which of what? You need to be specific when asking questions.
Well the hormone would be one thing. I'd say because it strengthens our heart muscles and trains our breathing pattern to be more effective. These would lead to more efficient transportation of blood and hence oxygen to our whole body including our brain. Our brain becomes more alert, and our body more energetic.
