GEOLogic questions are puzzles that were developed to support students understanding of geoscience concepts while challenging them to develop better logic and problem solving skills. In this exercise, students are asked to resolve how many days each of five volcanologists spent at a given volcano and what day they started for the volcano. There is also a second part where students are asked to do some additional research about volcanoes on the web. This activity is appropriate for a high school science class or an introductory level undergraduate geoscience course, and can be given as an in-class assignment or homework assignment. Learning goals, context for use, teaching tips, materials, assessment tips and related resources are provided.