The brain teaser of an old sow crossing the bridge ~

The complete topic is "an old sow weighs 400 Jin, and a bridge bears 200 Jin, so how should pigs cross the bridge?" The topic is brain teasers, which can not solve problems with conventional ideas, but can expand imagination. The commonly used methods are:

Method 1: Maybe this pig is called "400 kg", but its own weight does not reach 200 kg, so it can cross the bridge safely.

Method 2: If the original name of Lou Pig is "Pig Zhuang", then starve it for a month and you can cross the bridge when the weight drops below 200 kg.

Method 3: Spend some money to ask experts to report that the bridge bears 400 Jin, and then Lou Zhu can boldly cross the bridge.

Method 4: Drain the water from the pig, and the weight of the pig can be reduced to less than 200 kg. After crossing the bridge correctly, inject water again.

Method 5: Lou pigs don't need wings. When the bridge is windy, Lou pig can fly when standing on the tuyere, because some people say that "pigs can fly when standing on the tuyere".

Extended data:

Brainstorming covers a wide range, including classics, puzzles, jokes, satire, mathematics, English, all mankind, cold jokes and so on. Other types of brain teasers include:

1, melons, cucumbers, watermelons and pumpkins can all be eaten, but what melons can't be eaten? Answer and explanation: fool, fool is a derogatory term, not an edible melon and fruit.

2. There are six steamed buns in the basin, each for six children 1, and there is 1 in the basin. Why? Answer and explanation: The last child took the basin.

Can you turn ice into water as soon as possible? Answer and explanation: the word "ice" becomes "water" by removing two points.