There is a boat parked by the deserted river. This ship can only hold one person. Two people came to the river at the same time, and both of them crossed the river in this boat.

Brainstorm: Because two people are on one side of the river and the other, they can cross the river.

This is a brain teaser. Suppose there is a man on each side of the river. A went to B by boat, and B didn't need to move, so A crossed the river, and B also crossed the river.

Extended data:

Brainstorming originated in ancient India. Brainstorming is a series of complete comic jokes published by the culture of the times on 1989 12.06, which changed from the comic question on the previous page to the unexpected answer after flipping through it.

At that time, there was a social craze in Taiwan Province Province, and all the streets and alleys were asking each other brain teasers, which evolved into a pattern of cold jokes and was later introduced to Chinese mainland.

Brainstorming has a wide range of categories, including classics, puzzles, jokes, satire, mathematics, adults, English, all mankind, cold jokes and so on.

This word game has an obvious feature, the title is very common, but the answer is very irritating or funny, and sometimes it plays an indirect role in swearing. Once cracked, it's amazing. So brain teasers can also adjust the atmosphere of the party.