What do three ghosts call a brain teaser?

The answer is: "Call for help."

Explanation and analysis: The title explains that this question is a "brain teaser"; there are two ways to solve the question: What should three ghosts be called? One is to simply ask what word three "ghosts" can be combined into , what is this word called; and the other type is what a person would call "three ghosts" when he encounters them. According to the brain teaser problem-solving ideas, it can be judged to be the second type. If a person encounters "ghosts", Then of course I would call for help.

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.