Can you solve it? Are you a match for the world’s smartest teen?

In a historic performance at the International Mathematical Olympiad (IMO), British student Alex Chui achieved an unprecedented feat by scoring a perfect 100% in the competition held in Shanghai. At the age of 17, Chui, a year 13 student at Tonbridge School in Kent, has won a total of seven medals so far, out of which five are gold.

The IMO, an annual event since 1959, brings together young mathematical prodigies from over a hundred countries to solve complex problems. Chui's seven gold medals are a testament to his exceptional mathematical prowess.

During an interview, I asked Chui about his favorite puzzle, which he enthusiastically shared. The puzzle posed a challenge that required finding the number of ways to fill a 3x3 grid with positive whole numbers so that the product of the numbers in each row and each column equals 30. At first glance, one might think to count the completed grids individually, but this approach would be time-consuming, as there are more than 200 possible ways to solve the puzzle.

Chui's solution will be revealed at 5pm UK today, showcasing his remarkable ability to tackle intricate mathematical problems with ease.

The IMO is a two-day event, with each day consisting of a four and a half hour exam containing three questions, each worth seven points. This year marks the first time Chui has scored a perfect 42/42, solidifying his position as the world's smartest teen at the age of 17. Chui, who plans to study mathematics at Cambridge next term, has brought immense pride to the UK and the world of mathematics.

Since 2015, I have been setting a puzzle here on alternate Mondays, always on the lookout for exceptional mathematical challenges. If you have a great puzzle to suggest, please feel free to email me, as I am eager to continue exploring the fascinating world of mathematics with you.