Can You Solve This Family Puzzle?

Mr. and Mrs. Wang have four children: three boys and one girl.

Each of the three boys would have one sister.

But that sister is the same person for all three brothers.

So we only need to add one sister, not three sisters.

That brings our final total to 12 people.

Let’s check the family one more time so there is no double-counting.

Mr. Wang and Mrs. Wang continue reading …