Need some quick and easy worksheets to leave for your sub on the days you are gone? Not to worry, here is a set of 10 worksheets aligned to the common core standards that address the skills of multiplication and division in a fun format. Students solve the problems and by doing so, are able to solve the riddles. The problems are geared more for 4th and 5th grade. Great for a sub, but also can be used for extra practice, early finishers, and as a math center activity. Answer key is included.