Caloric intake f*cks with brain power.

"I will be the first to tell you every single person in this cast is awful at math," the beauty laughed to the Daily News at a Cinema Society screening of the gambling movie. "Jim [Sturgess] clearly had to know more math for his scenes. But no, I could never count cards," she emphatically stated.
I'm pretty sure living on wheat grass shots and gum has to take its toll on Kate's ability to think. Perhaps a cheese burger might bring back her aid in her math skills.