Test your knowledge of Nigeria, from its economic heft to its struggle against Boko Haram.

Test your knowledge of South Korea, from its thriving economy to its relations with the North.

Test your knowledge of Yemen, from its history to its ongoing civil war.

Test your knowledge of Cuba, from the missile crisis to its recent reforms.

From population to trade, test your knowledge of China's history, politics, economy, and relations with the United States.