Those questions are solved using pen and paper. The contestants that achieved the best results get to the finals. The organizers of the competition hope to add additional levels to the competition, in order to encourage the participation. After the team was selected, the training begin. The team leader organizes few meetings and gives questions and studding mateirial.
Some countries put their teams in a training camp.
The International contest is held every year in a different country. The team of each participating country is consists of the four contestants, two team leaders, and sometimes additional members such as trainers and observers. Every team gets a local guide that takes care of team. The duration of the competition is 8 days. Two of them are competition days, and the others are for ceremonies, excursions and social activities.