A man and his wife were driving in a car, when the wife's behaviour caused him to stop the car and rush to the nearest house. When he returned to the car, he found his poor wife at death's door and there was a stranger in the car with her. When the police arrived, they did not arrest or even question the stranger. How come?
The woman had delivered a baby.
You have a 4 gallon and a 7 gallon jug of water. How can you measure exactly 6 gallons of water using these two jugs?