The teacher asks Alberto that, there are 5 birds on a wire and asks how many birds are left of them after one of them was shot by a bullet.
The answers that Alberto gave was that, there was none left because the other flew away. The teacher says that the correct answer was 4, but she liked the reasoning Alberto applied.
Alberto asks the teacher if she could answer, which one of three
ladies who are having is married. Knowing that one is licking the ice cream, another have a  mouthful of ice cream  and the last one sucks the ice cream. After the initial embarrassment the teacher responds: The one that sucks the ice cream is the  married one.
Alberto says the correct answer is that,  the married woman is the one that is wearing a ring on the ring finger of the left hand, but he also liked the reasoning applied by the teacher.