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Flags.net
Flags.net is a database of current and historical flags for countries, political subdivisions, organizations, and the like. Flags can be searched with virtually any criteria, from the name of a country to their colors.
Soft Schools
Soft Schools: Flags of Asia Quiz
Take an interactive, multiple choice quiz over the flags of Asian countries. After completing the quiz, check your score, and then revisit any incorrect question for further review.
Lizard Point Quizzes
Lizard Point: Europe: Match the Flags to the Country Quiz
Test your national flag knowledge by taking this interactive quiz over the flags of the European countries.