A math wrangle is a competition that is similar to a debate between two debate teams.
The teams are first given an hour to solve eight math problems and prepare presentations of their solutions.
After this initial preparation the teams meet before an audience and a panel of judges. The teams take turns challenging each other to solve one of the eight problems. After one team presents a solution, the other team tries to either improve the solution or point out flaws or errors.
The panel of judges award points to the teams for the both solution and rebuttal based on correctness, completeness, clarity and style.
Here are some resources for Math Wrangling: