Watch the video: Many fail – probably the shortest intelligence test in the world.
Probably the shortest IQ test in the world: A lake is covered with water lilies at one point. The number of plants doubles every day. After 44 days the body of water is completely covered with water lilies. The question is: After how many days will half of the lake be covered?
Here comes the solution: Can you get to 22 days? Then that’s unfortunately wrong. Because: After 44 days the lake is completely covered. Since the number of roses doubles every day, there were only half the water lilies a day before. The correct answer is therefore: After 43 days.