The level of intelligence is usually expressed by IQ, which is used to express the level of intellectual development. What needs to be pointed out in particular is that intelligence does not mean wisdom, and there is a certain difference between the two. The following is my puzzle about digital brain teasers, welcome for your reference!

1, Math Brainstorming: Combination Numbers

Can three cards of 2, 1 6 be arranged into an integer divisible by 43?

Answer: 129 (just turn 6 cards)

2, math brain teaser: guess idioms

9999 is fine (to use an idiom)

Answer: It's foolproof.

3, math brain teaser: guess the number

The number without the first number is 13, and the number without the last number is 40. What's the number, please

Answer: Forty-three

4. Math brain teasers: newspaper news

The news published in the newspaper may not be 100% true, but what news can never be false?

A: The year, month and day in the newspaper.

5, math brain teaser: cut watermelon

A watermelon is cut into 9 pieces with 4 knives. How to cut?

Answer:? Hmm? Text cutting type

6. Math brain teaser: Mom irons clothes.

Han Xiao's mother ironed clothes. It took five minutes for a dress and three minutes for a pair of trousers. There are three small clothes and a pair of trousers now. How many minutes does it take Han Xiao's mother to iron them?

Answer: 18 minutes

7, math brain teaser: children eat cakes.

It takes three minutes for three children to eat three cakes, and how long does it take for ninety children to eat ninety cakes?

Answer: Three minutes.

8. Math brain teaser: the tailor cuts the cloth.

A tailor has a piece of woolen cloth, which is 16 meters long. She cuts off two meters from it every day. A few days later, she cut off the last piece of woolen cloth.

Answer: (8- 1)=7 (days)

9, math brain teaser: sub-bagged apples

Xiaoli and her mother bought eight apples, and her mother asked Xiaoli to put them in five pockets, each of which was even. Can you do it?

Answer: Put two apples in each pocket, and finally put all four pockets in the fifth pocket.

10, math brain teaser: shaking hands at the party

At a banquet, a couple shook hands with the guests 48 times and asked how many people were at the banquet.

Answer: 26 people;