The 16-year-old received the highest mark for WA in the International Competitions and Assessments for Schools (ICAS) Mathematics competition.
The test assesses students’ numeracy and problem-solving skills.
The Parkwood resident said he loved mathematics because it was satisfying seeing everything come together.
‘I feel very happy to get the highest mark because it is something that I enjoy doing,’ Jeffrey said.
‘My tip is to have a keen interest in maths and to practise solving challenging maths problems.’
In his leisure hours, Jeffrey also enjoys watching science fiction and comedy shows and playing video games.
Willetton students also received eight prizes, 16 high distinctions and 91 distinctions in the Australian Mathematics Competitions.
Students completed 30 questions in 75 minutes without a calculator.
Prizewinners included Christopher Chivers, Nancy Shi, Jordan Hoffman, Andrew Tan, Alex Lugovskoy, James Dow, Jeffrey Wong and Ryan Sam.
Year 8 student Yi Seng Yap received the Prudence Award for getting the most consecutive correct responses starting from question one.