13. Guinea
Average IQ: 67
Change in Education Index: 10.11%
The official language of Guinea may be French, but it is far behind France when it comes to development.

alarico/Shutterstock.com
Average IQ: 67
Change in Education Index: 10.11%
The official language of Guinea may be French, but it is far behind France when it comes to development.
alarico/Shutterstock.com