Eighteen-year-old Alex Chui has etched his name into the history books of the world's oldest, most prestigious, and most rigorous high school mathematics championship.

Eighteen-year-old Alex Chui has etched his name into the history books of the world's oldest, most prestigious, and most rigorous high school mathematics championship.

Deng Leyan scored a perfect 42 at the International Mathematical Olympiad for the second year running when the 67th edition closed in his home city of Shanghai this week.