International Youth Math Challenge | 1,612 followers on LinkedIn. The International Youth Math Challenge is one of the biggest math competition for students from all around the world. | The International Youth Math Challenge is an international mathematics competition that enables students from all countries to prove their math skills and to unleash their creativity. Mathematics is essential for the understanding of the world, scientific achievements, and progress, and for engineering and prosperity in our society. There is no doubt that math education is crucial for students of all ages around the world.