3) Japan (Average IQ: 105)

PISA ranks Japanese students as the sixth best in the world. Elementary and middle school education is compulsory in Japan. Around 75 percent of high school graduates attend a university, trade school, junior college or higher education institution. This island nation is one of the leading countries in terms of scientific research.

2) South Korea (Average IQ: 106)

The South Korean society values academic achievement. As per a Bloomberg report, South Korea is the most innovative nation in the world. Citizens of South Korea are hard working and motivated.

1) Hong Kong (Average IQ: 107)

Over the years, intelligent and hard working people of Hong Kong have made it a major trade hub and a world city. People of Hong Kong have the highest average IQ in the world. PISA ranks the nation’s education system as the second best in the world. There are eight pubic universities and one private university in Hong Kong. The education system encourages healthy competition among students.