The Stupidest Day

By this time, I think I am stupid. I think that if I can't do what the rest can achieve easily, that's stupidity. Looking at my ex-neighbour who has a mental handicapp, I wonder if I belong to that category without realising it. So many people have been deceived by my innocuous self. Or maybe I'm just lousy in Mathematics. Am I stupid? Am I clever? Who can tell?