Medically reviewed by Dakari Quimby, PhD The average IQ score is designed to be 100.Genetics accounts for about 50% of the IQ ...

According to this World of Card Games ranking, Switzerland is the smartest country in the world based on a variety of criteria from average IQ to education levels. The U.S. also makes the top three.

People often talk about very high intelligence quotient (IQ) scores, often referred to as genius IQ scores, but what exactly do these numbers mean and how do they stack up? How do IQ scales break down ...