World Maths Day 2012 is underway.

The competition is designed for ages 4-18 and all ability levels. Teachers, parents and media can also register and play.

Last year, more than five million students from 218 countries combined to correctly answer 428,598,214 World Maths Day questions.

Each game lasts for 60 seconds, and students can play up to 50 games, earning points for their personal tally. Students can play beyond 50 games during the event, but points will only count to the World Maths Day Mathometer, not their personal point score. The students who answer the most questions correctly appear on the Hall of Fame. There are 5 different levels of play, 10 challenges on each level.

The official World Maths Day competition begins with the first second of March 7 at midnight in Apia, Samoa, and continues as long as it is March 7 anywhere in the world. The total competition time is 48 hours.

For further information, visit the World Maths Day site and check out the Resources section.