The Arch Villain Problem - Mathtropolis. When the Arch Villain wreaks havoc on the city of Mathtropolis by turning everything into arches, Super Peg and Cat Guy come to the rescue. Primary Content: Arches, finding arches in other shapes; Secondary Content: Counting backwards from 9, counting by threes.The Straight and Narrow Problem - Mathtropolis. Super Peg and Cat Guy trail the Arch Villain, who has given up his arch ways and gone on a rampage with straight and narrow shapes instead. Primary Content: Understanding straight, narrow, curved; Secondary Content: Counting sides to determine shapes (rectangles, triangles, squares), counting by tens to 100.