qqp question1: If I drew a line along Wall Street, how many people currently and could feasibly live between there and the southern tip of Manhattan? question2: If you have a square box filled with two layers of chocolate squares and you eat all 20 pieces in the upper layer along the wall, how many are left in the box? Is there a graphical way to set this up or a math equation? Not only what is the answer and how do you get it, but how do you approach problems like this from a mathematician's mindset?