The first APhO was held in Singapore in 1988.

Five countries participated in the first APhO: China, Japan, Singapore, Thailand, and the Philippines.

China has won the most APhO gold medals, with a total of 107 gold medals as of 2022.

China has hosted the APhO the most times, with a total of 10 times as of 2022.

The maximum number of points that a team can score in the APhO is 400.

The minimum number of points that a team needs to score to win a medal in the APhO is 200.

A total of 30 medals are awarded in the APhO: 10 gold medals, 10 silver medals, and 10 bronze medals.

The duration of the APhO exam is 5 hours.

There are 5 problems on the APhO exam.

The APhO exam is a combination of multiple choice, short answer, and essay questions.

The language of the APhO exam is English.

Only high school students are eligible to participate in the APhO.

The age limit for participating in the APhO is 18 years old.

Teams are selected to participate in the APhO by a combination of national physics competitions and invitations.

The prize for winning the APhO is a gold medal, a cash prize, and a scholarship.