If you find your mind already spinning, you’re certainly not alone. Up to 80 percent of those who attempt to solve this brain teaser get it wrong. But fear not! Mathematician Presh Talwalkar, known for his popular YouTube channel “Mind Your Decisions,” provides a clear explanation in a helpful video.
First, we must explore the logical possibilities, as Talwalkar explains. One scenario is that Bob is married. In this case, if Bob is married, he is indeed looking at unmarried Charlie. However, if Bob is not married, then it implies that married Alice is looking at unmarried Bob.
“So, in either scenario, it holds true that a married person is looking at an unmarried person,” Talwalkar concludes. This leads to his verdict: The correct answer is “Yes.”
“Although we don’t know which married person is looking at an unmarried person, we know that at least one married person is indeed looking at an unmarried person,” he clarifies.
Fair enough. Now, perhaps someone should remind these individuals to start wearing their wedding rings.