It is an web event where you compete against other kids around the world in mental maths challenges.
Taking part in World Maths Day helps you develop speed and accuracy with your mental maths facts.
There are over 2 million students from 37,000 schools in 200 countries taking part and every question we all answer correctly, helps us try to break last years record of 452,681,681 correctly answered questions.
Each of us had two 20 minute game sessions over the day. Most of our competitors were from the USA, Canada, England, New Zealand and of course Australia but some of us competed against kids from Hong Kong, Thailand and Malaysia too.
The video below shows the fun we had taking part in World Maths Day and do you know what the best part is?
We get to do it all again tomorrow because it will still be March 3 in other parts of the
world!





