Yes, it was something along those lines but the project has evolved into a full blown novel. However, I'm still in the planning stage but I've improved considerably since then.
Maybe you aren't quite at that stage yet. But increasingly you'll find your ability to perform Maths, ability to think quickly and clearly, ability to remember a barrage of numbers and information and all these...just go with time. Hence I'm stupid now ^^.
I think I see what you mean; but I never got Math! =D So I'll never fail at remembering the numbers! And you're not stupid! Just there's too much info in that head of yours, some has to get out =P
So do I, mostly the feeling of being incapable of doing anything; or knowing that your mind changes facts about events that happened in the past, and that you now perceive them in a different way than how they truly took place.