Do you need to provide your students with more practice evaluating simple math equations for accuracy? This is the perfect resource! This is a book of ten math equation puzzles and their answer keys. Children must analyze each equation to see if it is correct or incorrect. They must color each equation with a certain color based on its accuracy. After analyzing each equation, they will discover a mystery number! They must then write the number they discovered and compose four math equations that equal that mystery number. This practice encourages higher level thinking and is aligned to the common core math standards for first grade. My first graders love these math puzzles! This book provides enough practice for ten weeks at a math center. Include a book of answer keys to allow children to self-check their work. Answer keys are provided!