Mathématiques sans Frontières is an annual international mathematics competition for schoolchildren, centrally run by the Académie de Strasbourg, where the UK branch of the competition is administered and funded by the Scottish Mathematical Council and volunteers.

The competition involves several mathematical puzzles where one is posed, and must be answered, in a foreign language. The light-hearted competition is designed to promote mathematics, the practice of a foreign language, and teamwork.

There are two divisions to the competition: the Junior section (S4 level) has 10 questions, and the Senior section (S5 level) has 13 questions. Both sections have a 90 minute time limit. It is a team event, with teams normally consisting of an entire class. However, pupils should split the questions up between themselves for full effectiveness.