All challengesTraining run
Population pressure per square kilometre
Population Density
Live score0/10
12345678910
Inside the question engineOpen the field notes
Country pairs are matched by population density: population divided by land area. Each stage makes the gap more subtle.
Questions 1-250%-150%
Questions 3-520%-35%
Questions 6-810%-18%
Questions 9-102%-8%
Building your question...