mathello abacus mental arithmetic competitions test a participant's ability to perform complex calculations using an abacus. In just 6 minutes, the participants has to solve up to 150 sums with digits ranging from 600 to 2000. This contest promotes mental agility, focus, and speed in arithmetic calculations while fostering teamwork and encouraging students to learn from each other. Winning such competitions can have a profound impact on a student's future academic and professional success, as they develop important math skills that are applicable in many fields.