This is an image which caused my students a great deal of trouble. I thought it was pretty fun because I don’t think there is any cute trick counting this. I want to know how many faces, edges and vertices there are. If you are an advanced math lover then consider Euler’s equation relating to polyhedrons. Euler says:
number of edges = number of faces + number of vertices – 2
Does this equation hold here?
(If you getstuck on the 2nd question, there is a hint in the image mouse-over.)