Lets start off with one considered to be a classic puzzle:
The man in the elevator. A man lives on the tenth floor of his building. Everyday he catches the elevator down to the ground floor and goes to work. On the way home he always takes the elevator to the seventh floor and walks the remaining flights of stairs to his apartment on the tenth. Why does he do this?
(Cacher) Si vous ne voulez pas que les autres utilisateurs sachent ce que vous êtes en train de faire sur ce site, vous pouvez changer les réglages (abonnés seulement) en activant le mode invisible. (pauloaguia) (Montrer toutes les astuces)