Test your knowledge of population data for the World Cup teams! Click on the name in each match-up that you think has the larger population. Green shows a correct answer, red indicates an incorrect answer. When you have opposing names picked for the next round, pick again. See how close you can come to a perfect score of 31. When you are finished, play again or mouse-over results to view the populations, in thousands, for each pair.

Click here to play World Cup Population Barcketology.

SOURCE: US Census Bureau