The United States entered World War I on April 6 of the Mystery Year. As student solve math clues for the year, they find the width of a right prism when given the length, height, and volume, solve a proportion, and estimate the sum of two mixed numbers. Your Zip download includes printable/digital PDFs:1-page printable Student Puzzle, also prepped for Easel1-page Answer Key with sample solutions1-page version of puzzle with expanding form fields – use with Acrobat Reader A complete file includi