Michelle is the only girl to win gold in the UK's 10 categories of World Maths Day Global Challenge.
Budding eight-year-old mathematician Michelle from Deptford, east London, has been crowned the "top mathlete" in the UK Year 3 category of this year's World Maths Day Global Challenge.
It's a worldwide competition involving 10 million young children from 160 countries.
Michelle, who attends Grinling Gibbons Primary School, is the only girl to have won gold in the 10 categories this year.