Eötvös Competition

The Hungarian Eötvös competition is perhaps the oldest high school physics competition in the world, with over a century of competition since its first edition in 1894. Each contest lasts for 5 hours and has 3 short problems. The competition tests creativity and problem-solving skills not found in most modern physics olympiads, and inspired the European Physics Olympiad. Many of the old problems (pre-2018) have made their way into 200 Puzzling Physics Problems and its sequel. Note that it is an open-book exam, so you are expected to have a standard constants sheet with you (e.g this). In my translations, I will make a note when it requires information that isn’t in a standard constants sheet.

There was a typo in the 2018 paper, where the final temperature in problem 2 is wrong. I have corrected it in all versions, including the problem statement in Hungarian. Other than that, problems 1 and 3 are really good.

Links: Problems and Solutions (pre-2021). Some interesting history of the competition