In Chapter 9 when Alex and Sayle are having their snooker competition, the math is all wrong. Alex first establishes that there are 24 points on the board. Sayle then gets 1 point, but later fouls so that Alex gets 6 points, then runs the board and gets the remaining 23. This adds up to 29 points. But Alex says that he has won 4000 pounds, or has gotten 40 points.