This PowerPoint activity encourages students to practice with place value skills. Students will read the clues on each slide to determine the mystery number. There are 40 slides that progressively get harder as they continue. The beginning mystery numbers are two digit numbers and the slideshow ends with five digit numbers. This activity could be used for morning work on a classroom computer or printed for math centers. Students will master their understanding of place value after completing this activity! Students love finding each mystery number!