Answer: 1

2. A tailor has a piece of cloth, which is16m long. She cuts off two meters from it every day. A few days later, she cut off the last piece of cloth. The answer is: (8- 1)=7 (days).

3.a b c + c d c = a b c d

How much is abcd?

Answer: a= 1 c=9 d=8 b=0.

109+989= 1098

4. Ali said that under certain conditions, 4- 1=5, and said that Xiaoying can prove the correctness of this method by graphic means. After Ali produced the evidence, she had nothing to say. How did Ali prove the test? Guess.

Answer: A table with four corners has five corners after cutting off one corner with a knife.

5. The price of each bottle of soda is 1.00 CNY, and every two empty bottles can be directly exchanged for 1 bottle of soda. If you buy soda with 20.00 CNY, how many bottles can you drink?

Answer: 1. Buy 20 bottles, drink 20 bottles, and empty 10 bottles (20).

2.20 Empty bottles are 10 bottles, drinking 10 bottles and empty 10 bottles (10).

3. 10 5 bottles for empty bottles, 5 bottles for drinking, 5 bottles for empty bottles (5)

4.5 Empty bottles for 2 bottles, drink 2 bottles and empty 3 bottles (2)

5.3 Empty bottles are 1 bottle, drink 1 bottle and empty 2 bottles (1).

6.2 Empty bottles are 1 bottle, 1 bottle, and empty bottles are 1 bottle (1).

7. Borrow 1 empty bottle, * * 2 empty bottle, exchange 1 bottle for drinking, and exchange the empty bottle for someone else (1).

Total: 20+10+5+2+1+1= 40 bottles.

6. 1-70 1=2 spelled with matchsticks. Move a matchstick to make the equation hold.

Answer: 1 plus the minus sign on 1 = 2...7.

7. When is 5 greater than 0, 0 greater than 2, and 2 greater than 5?

Answer: 5 is cloth, 0 is stone and 2 is scissors.

8. An officer made 24 soldiers stand in six rows, with five people in each row. Soldiers are all stupid. The last soldier finally came up with a good idea. How did he arrange it?

Answer: Just arrange in a hexagon.

9. How many eggs are there in a dozen?

Answer: 0, because it is broken.

10. A person bought a chicken for 8 yuan, sold it for 9 yuan, and then thought it was not worthwhile. He bought it with 10 yuan, and bought another one with 1 1 yuan. How much did he earn?

This is a question:

There are three algorithms:

1. At first, there was only 8 yuan, and finally you had 1 1 yuan, so you earned 3 yuan;

2. The first time the protagonist lost 8 pieces, and the second time he got a chicken; The hero gets 9 pieces and loses a chicken; On the third sale, the hero lost 10 and got a chicken. In the fourth transaction, the hero got 1 1, and one chicken was missing, so the total GDP was 8+9+10+1= 38 yuan +4 chickens.

There are three transactions in the whole event. Let's see which three deals are specific.

The first transaction: 8 yuan buys, 9 yuan sells, and gains 1 yuan;

The second transaction: 9 yuan sells, 10 yuan buys, and the profit is-1 yuan;

The third transaction: 10 yuan buys, 1 1 yuan sells for profit 1 yuan;

The whole process:1-1+1=1yuan.

So the analysis shows that this person is a fool, because the last two transactions are equal to nothing.