Solution: A Touchy Situation

Last month's puzzle had two parts. In the first part students were challenged to see how many rods (we suggested using Cuisenaire Rods�) they could place flat on a table in such a way that each rod touched every other rod with no stacking allowed. The maximum number possible in this part is four (one solution appears below). In the second part, students were to do the same thing, but this time they were allowed to stack the rods. We know that it is possible to get six rods all touching, but I do not know if this is the maximum number. If your students have gotten more than six, please send in their solution and we'll be happy to share it with our readers.