A man tries to an exclusive herenclub to get inside. After that he went to the door of the club in the eye, he notices that the members are a kind of secret code to use. When someone is the entrance of the club approaches, the door ajar, and get them from the bouncer is a number toegefluisterd. The members reply with their own number and are then let in. the
As the first person at the door is the number “12" to hear, to which he “6" replies. The following gets a “6", which he “3" replies. the
At that time, think the "stool pigeon" in the code. He's getting confident on the door and listens to the bouncer. He gets the number “10" which he's convinced, “5" answers. But instead of being open to swing, the door is closed again. The man had the error.
What did the man actually have to answer to be admitted?