Once there was a King in Bangladesh whose name was Sulta Mohamood. He had a daughter. She was very beautiful. One day the King told his daughter to get married to someone who she liked. But she told him that she would marry a boy who was more intelligent than her.
So the King announced it everywhere. Day after day many princes came to the palace to answer and asked questions. But everyone failed and nobody married her.
One day a very poor boy who was the servant of that King came to the princess and asked, "Do you know that your father borrowed 2 million dollars from my grandfather?" The princess told him that she did not know, and this was the one answer that hte princess did not know, and she was defeated by that poor boy. So she was bound to marry that poor boy.