This activity is geared for the Halloween holiday season..
I recommend using it following a lesson on work problems, mixture problems ,coin problems and/or distance problems where more than one rate and time is considered. It could also be used in an Algebra II class for review over this material which is generally covered in algebra I Systems of Equations and/or later on over the chapter covering Rational Expressions. It could also be used in Algebra II as a warm-up and/or cooperative learning exercise. Answers are provided for each of the problems, and each is worked out entirely, step by step. This activity is a great reinforcement, while it is a bit entertaining.