Question: I don't know if this question qualifies, but how much does ADHD have to do with feeling/behaving and acting your age? I always had the distinct feeling that sometimes I'm not as intelligent and good at handling certain situations as people my age.
  I also want to ask about ways an adult can remaing consistent and learn properly, math for example, which is one of the things I have to practice for my entrance exam to grad school. Learning stuff becomes tough and paying attention to details, maintaining focus on many things while having a train of thought and thinking is difficult. How does one improve this?
Answer: The DSM diagnostic manual states that a patient's symptoms of ADHD must be "inconsistent with developmental level". That's a fancy way of saying they must be worse than expected for the person's age. So, in that sense, a person with ADHD is not acting their age, with regard to the symptoms of the disorder. 
    
  
    
  I have no simple answer to your question about studying. Cognitive behavior therapy may be useful. I trust the authors who wrote these books, which may be helpful. Taking Charge of Adult ADHD by Russell A. Barkley The Adult ADHD Tool Kit: Using CBT to Facilitate Coping Inside and Out by J. Russell Ramsay  and Anthony L. Rostain
content: Q: I don't know if this question qualifies, but how much does ADHD have to do with feeling/behaving and acting your age? I always had the distinct feeling that sometimes I'm not as intelligent and good at handling certain situations as people my age.
  I also want to ask about ways an adult can remaing consistent and learn properly, math for example, which is one of the things I have to practice for my entrance exam to grad school. Learning stuff becomes tough and paying attention to details, maintaining focus on many things while having a train of thought and thinking is difficult. How does one improve this?
   Ans: The DSM diagnostic manual states that a patient's symptoms of ADHD must be "inconsistent with developmental level". That's a fancy way of saying they must be worse than expected for the person's age. So, in that sense, a person with ADHD is not acting their age, with regard to the symptoms of the disorder. 
    
  
    
  I have no simple answer to your question about studying. Cognitive behavior therapy may be useful. I trust the authors who wrote these books, which may be helpful. Taking Charge of Adult ADHD by Russell A. Barkley The Adult ADHD Tool Kit: Using CBT to Facilitate Coping Inside and Out by J. Russell Ramsay  and Anthony L. Rostain