Problem 42. In this puzzle, the total weight is 54 grams. Find the weight of each piece. Is there more than one an- swer? How do you know you are right? In a mobile, the arms must be perfectly balanced for it to hang properly. The artist Alexander Calder was famous for his artis- tic mobiles. You can view some of his amazing work here. Click "Explore Works." Problems 41-42 present you with mobile puzzles. In these puz- zles: Objects that are the same shape have the same weight. (So all circles weigh the same, all squares weigh the same, etc.) • Assume the strings and rods that hold the objects together don't factor into the total weight. . Each arm of the mobile must have exactly the same weight.