IT WAS no mean feat, but Berwick's Tatiana Devendreneth beat more than one million students in the World Maths Day Mathletics competition.
The 15-year-old won the title after answering a staggering 65,199 correct maths questions in 48 hours.
Her mother Naomi Kevin could not be more proud of her daughter.
"She was determined to get 50,000 correct answers in the 48 hours and just kept going," Mrs Kevin says.
"She has a competitive spirit."
Tatiana says she hasn't always enjoyed maths, but once she discovered Mathletics she found she was addicted.
"I am in advanced maths at school, but I wouldn't say I was good at all [types of] maths."
After witnessing a Mathletics demonstration from Tatiana it was easy to see how she came in at No.1 - she can answer questions at an astonishingly fast rate.
Her record is 105 correct answers in 60 seconds. But how did she sustain 48 hours of Mathletics without losing her concentration?
"Well, I got six hours' sleep each night and my mum kept feeding me," Tatiana says.
"The worse thing was my eyes got really sore - and I needed drops in them at times, but I managed to concentrate the whole time."
For Tatiana, Mathletics is fun, and that's the aim of it. It's been designed for ages six to 16 to improve their maths skills while enjoying competition from around the globe.
Tatiana says she enjoys playing against other children from around the world, but especially against the children from Hong Kong "because they are really fast."
She is also vying for another sought-after position along the Mathletics ladder - answering her millionth question.
"I am up to 939,852 at the moment, so I will get there."
World Maths Day is a free web-based event and an Australian innovation, created and hosted by the Australian-owned and managed 3P Learning company.
Chief executive Tim Power says the day was a huge success with more than 146,480 Australian students from 1359 Australian schools taking part.
"Enormous congratulations to Tatiana for her sensational effort in winning the accolade of world Mathlete champion," he said.
To celebrate her win, Tatiana and her mother were invited to Mathletics headquarters in Sydney.
"That was a real thrill for both of us," Naomi says.
"The team there were fantastic - they were really pleased to meet Tatiana - they asked her if she was sure her laptop wasn't connected to a computer (that was generating the answers for her) because she was so fast."
Tatiana will receive her trophy at Haileybury College's Berwick Campus, on April 4.
And as for Tatiana's future? She says she's not 100 per cent sure yet, but it will be in the humanitarian field.
For more information visit www.worldmathsday.com or www.mathletics.com
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