I was looking here www.madrid-guide-spain.com/madrid-metro.html and the 10 ticket Metrobus deal looks good if we can share them so we both get 5 tickets. We would need to go from the airport to hotel, up to 3 trips in town and then back to the airport. How does the supplement to the airport work? Do they take one extra ticket from the Metrobus or you have to pay in cash?
Is the Metrobus like the Parisian carnet where it is a packet of 10 tickets you put into the turnstile?