The Perfect Ten Problem - TV Show Set. Peg and Cat are judging a singing competition in which all performers must get a rating of exactly ten stars. Primary Content: Adding to 10; Secondary Content: The number 0. The Long Line Problem - The Purple Planet. While waiting in a long line, Peg and Cat try to help Richard realize his dream of being first in line for the first time. Primary Content: Ordinal numbers, using a number line; Secondary Content: Positional relationships (in front of/behind), counting to 20.