 In spite of the fact that it was nearly impossible to leave the show  without earning at least 25 pesetas, thanks to the rules of counting  as one answer the example the host gave after a question, which  could be repeated by the contestants, in 1976 there was a couple  that finished with 0, because they didnt repeat the example and so  25x0 was 0. This way, no matter how many answers they performed in  the following questions, as each answer was 0 pesetas, they finished  with 0. It never happened again.