The Math Kids: An Unusual Pattern

When their new friend, Special Agent Carlson, asks them to take a look at a cryptic poem written by a dying bank robber, The Math Kids know they will need all of their math skills to crack the case. The poem isn't their only problem, though. Their favourite school janitor is fired for stealing from student lockers. Jordan, Stephanie, Justin, and Catherine know Old Mike would never do anything like that, but how can they prove it, especially with the new janitor watching their every move?