The problem is that the question is poorly written, so it taps into the human brain's desire to extrapolate. By saying "a card" in the general sense, it sounds

The problem is that the question is poorly written, so it taps into the human brain's desire to extrapolate. By saying "a card" in the general sense, it sounds like there might be more cards involved, and we are supposed to derive a rule for a larger set. If you explicitly state that the only cards you are talking about are the cards shown here, things become a lot more clear. To clarify the question: "When one of the cards here has an even number on one face, then its opposite face is blue. True or false?" In my experience, it seems like lot of interviewers like to make themselves come across as "clever" by relying on poorly phrased questions which can be easily misinterpreted.