Only 20% of Harvard students aced this three-question IQ test... how will YOU get on?

The world's shortest IQ test not only reveals your intelligence but also your level of patience. The test, called a Cognitive Reflection Test (CRT), consists of three math-based questions that target a person's ability to ignore their initial gut response in favor of a more rational thought process. Many quickly assume the answers are simple, but the Yale University professor who created the exam warned it isn't as straightforward as it may seem. Professor Shane Frederick created the CRT in 2005 and only 20 to 40 percent of students who have attempted it have passed. A Yale University professor designed a Cognitive Reflection Test ( CRT) that consists of three math-based questions that target a person's ability to ignore their initial gut response in favor of a more rational thought process Mathematical brain teasers are useful in helping people develop logical thinking by promoting brain stimulation and build visual and spatial reasoning skills.