Yale professor Shane Frederick has invented a three-question test called the Cognitive Reflection Test (CRT), which measures your ability, as Gladwell puts it, “to understand when something is more complex than it appears — to move past impulsive answers to deeper, analytic judgments.”
Two of its three questions are . . .
1. A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?
2. If it takes 5 machines 5 minutes to make 5 widgets, how long would it take 100 machines to make 100 widgets?