Let’s try a puzzle that looks super easy at first. Sometimes the shortest questions make our brains work the hardest. Take a quick look at this one. A box has 900 balls. 90% are red. How many are not red? Most people will answer immediately. And...

Let’s be honest for a second. When someone asks, “How often do you clean your room?”, it sounds like a simple housekeeping question. But somehow it always turns into a personality test. The funny part is that our cleaning habits really can...