The article from Iltalehti invites readers to participate in a quiz that tests their knowledge of the world's largest cities as determined by population estimates for the end of 2025. The challenge is to name all 25 cities within a limit of seven minutes, encouraging quick thinking and recall. The quiz provides hints by indicating the country in which each city is located, helping participants narrow down their answers.

To succeed in the quiz, participants must be well-versed in global urban geography, particularly focusing on major cities, many of which are located in Asia. This not only makes the quiz a test of knowledge but also a fun and engaging way to learn more about world populations and urban centers. The interactive format of naming cities under a time restriction adds an element of excitement and urgency to the experience.

Overall, this quiz serves as a light-hearted yet informative activity for readers interested in geography and world cities. It invites readers to challenge themselves and their friends, while also promoting broader knowledge about urbanization and demographic trends globally. For those keen on further quizzes, Iltalehti encourages exploration of additional quizzes available on their platform.