Do your students need extra help or practice with the concept of factors or common factors? Then this is for you! This activity will help students learn and become more confident with their multiplication tables, as well as find common factors between two numbers. Students will use their knowledge of factors to determine the missing "Mystery Number." I have included two pages of problems, a "How To" section to explain to teachers (or students) how the puzzles are solved, and an answer key.
My students love these puzzles, and always beg for more!
Borders and fonts are from Graphics from the Pond