This is a quiz axed on logical or mathematical enigmas. As for the previous, the first who will find the right answer ask a new question.
In a circus, after the show, the horses, which are marked from 1 to 8, turn around the trail and leave the scene, following a precise order: the 5th horse passing in front of the door leaves. So, the first to leave will be the n°5. Which horse will be the last to leave ?