Get mathematicians engaged with number terminology using this puzzle activity! Learners determine the selected number from a hundred board by eliminating numbers using clues. As a group, each learner has a specific role, outlined in the handout. After reading the clues and eliminating all but one number, the group has their answer! There are three puzzles to solve, and one template for learners to create their own. Consider the suggestion to create a bank of puzzles for future classes.