"These days provide better reflections of real mathematics careers, as working in groups to solve problems is more reflective of the industry than sitting at a desk alone solving problems in isolation with a 3-hour time limit."
This year, the format of the competition for Year 12 students changed to a quiz-like format with five rounds.
Teams got all the questions at once and had fixed periods of time to answer them, ranging from 10 to 12 minutes.
Head of the institute of fundamental sciences professor Martin Hazelton hoped the students would stick with these disciplines.
"The jobs we have today and increasingly the jobs of the future will need the skills you have demonstrated today," he said.
"So keep at it in class and it is going to pay-off in your future careers."