Brain teaser, which car is the most fuel-efficient?

Burning the midnight oil.

Explanation and analysis: This question is a brain teaser question. The question asks "Which car is the most fuel-efficient to drive?" According to the conventional thinking, it is asking which car has lower fuel consumption, but brain teasers cannot be used. To solve the problem with a conventional approach, the car in the question only asks about fuel efficiency, and does not emphasize what kind of car it is. The most fuel-efficient thing is that it does not require oil. For working overtime, there is an extra special vocabulary, which is "burning the midnight oil", so the answer is to burn the midnight oil. The most fuel efficient.

Extended information:

Brain teasers are widely classified, including classics, puzzles, comedy, satire, mathematics, English, human beings, cold jokes, etc. Wait, other types of brain teasers include:

1. You can eat winter melon, cucumber, watermelon, and pumpkin. What kind of melon can’t be eaten? ——Answer and explanation: Fool, fool is a derogatory term, not an edible fruit.

2. There are 6 steamed buns in the basin. Each of the 6 children is assigned 1 steamed bun, but there is still 1 steamed bun left in the basin. Why? ——Answer and explanation: The last child took away the basin together.

3. Can you turn ice into water as quickly as possible? ——Answer and explanation: Remove two dots from the word "ice" and it becomes "water".