Math is mentioned often in the book. The book opens with a discussion of the equations on the special pajamas that he had made for his little sister. He also provides his older sister some mathematical guidance on how to maximize profits from the lottery (which she happens to win, ultimately leading to the ransoming of their little sister). The character frequently calls himself a "mathematician. (He is not one as I would define the word.) Of course, as the title implies there are references to game theory, but it is only described in vague non-mathematical terms. The most mathematically interesting thing in the book is a discussion of the probability that pieces of broken spaghetti can form a triangle, a challenge from a mean math teacher.

Despite all of that, however, math never actually matters in the book. It all sets him up as a "math nerd", but I was disappointed that math and game theory are both essentially irrelevant to the plot.