At first glance, this looks like a simple counting problem—but one small detail in the wording can completely change the answer. Mr. and Mrs. Wang have 3 sons, giving us 5 people so far. Each son has 1 wife, adding 3 more and bringing the total to 8. Then, each son has 1 son, adding another 3 people. We’re now at 11.

But there’s one final detail that can easily be overlooked. The puzzle says every son has 1 sister. It does not say that each brother has a different sister. The three brothers can all have the same sister, just as three brothers in a real family can share one sister. So we only need to add 1 person, not 3. 👀

Let’s check the family without counting anyone twice: 2 parents + 3 sons + 3 wives + 3 grandsons + 1 sister = 12 people. The sister belongs to the same generation as the three original sons, while the three younger boys are their children. That gives us the complete family described by the puzzle.

So the answer is C. 12 people. 🎯 The trick isn’t difficult math—it’s understanding the wording. 11 is tempting because it counts the parents, sons, wives and grandchildren, but forgets the shared sister. 14 would mean assuming every brother has a different sister, which the puzzle never says. The key is to slow down, read carefully, and avoid counting the same relationship as separate people.