This three-hour competition for teams of three students is held early November for undergraduates in the roughly Midwest region and is hosted locally by competing departments. Out of ten problems a good score might consist of at least four full solutions and some significant partial credit on a few more, although the level of difficulty ranges from year to year due to changing test writers. The problems for this challenge are typically wordy and will dress up familiar concepts in unfamiliar contexts, so it is useful to take caution early on when deciding what your team's plan of attack will be.

Site: https://www.alma.edu/academics/mathematics/math-challenge/