World's 20 smartest countries

Published: Dec 24 2013 10:35:43 AM EST   Updated On: Oct 24 2013 12:38:25 PM EDT
Book, reading glasses

According to a recent survey, American adult proficiency in literacy, numeracy and problem solving ranks as some of the lowest among developed countries, despite a relatively high level of education. Take a look at the world's 20 smartest countries.