Enter a number before cutting the birthday cake.

The number before cutting the birthday cake is 18.

Brainstorming originated in ancient India, that is, when thinking encounters special obstacles, we should quickly leave the habit of thinking and think about problems from other aspects. Now it refers to some intellectual questions that can't be answered by the usual way of thinking. Brainstorming covers a wide range: educational, funny, mathematical, adult and so on.

Brainstorming is a kind of entertainment and a popular word game. 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.

The origin of brain teasers

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. Word games refer to recreational activities with word skills as their content, such as couplets, crossword puzzles and idioms solitaire. Gan Long once said that the first half of the league was "difficult to shine", and Ji Xiaolan replied "easy".