Where is the dollar?
Little monkey, little bear,
The puppies meet and come to play in the street. They came to the supermarket and saw a cantaloupe just in 30 yuan, so everyone took 10 yuan and bought a cantaloupe. As soon as they walked out of the gate, a shop assistant ran out and said, "We have a discount today, as long as 25 yuan, this is your 5 yuan." The dog said, "Let's share the five dollars!" The bear said, "Good!" But the little monkey said, "We can't finish this!" " Then one person 1 yuan, leaving two dollars to buy a bag of melon seeds.
. Both the dog and the bear agreed.
On the way back, the bear said, "We spend money from 9 yuan for one person, and three times nine equals 27 yuan for three people. We also bought a pack of melon seeds, and one spent 29 yuan. Where did the dollar go? " The little monkey and the puppy said, "Yes! Why is a dollar missing? Strange? "
Children, do you know where this dollar went?
It turns out that 27 yuan includes 2 yuan. Whoever buys melon seeds, plus each person 1 yuan, is exactly 30 yuan.
When does the snail climb up the well?
A snail accidentally fell into a dry well. It lay at the bottom of the well and began to cry. A toad (Lai) crawled over and said to the snail in a muffled voice, "Don't cry, little brother! It's no use crying. The shaft wall is too high. If you fall here, you can only live here. I have been here for many years, and I haven't seen the sun for a long time, let alone want to eat swan meat! " The snail looked at the old and ugly toad and thought, "What a beautiful world outside the well! I can never live in a dark and cold well like it! " The snail said to the toad, "Uncle toad, I can't live here. I have to climb up! "! How deep is this well? ""ha ha ha,
What a joke! This well is 20 meters deep. How can you climb up with such a heavy shell at a young age? ""I'm not afraid of hardship and fatigue. I can always climb out after a while every day! " The next day, the snail ate and drank enough and began to climb the wall. It kept climbing and finally climbed 3 meters at night. The snail was very happy and thought, "at this rate, I can climb up tomorrow night." "Thinking about thinking, it fell asleep unconsciously. In the morning, the snail was awakened by a purr. At first glance, it turned out that Uncle Tu was still sleeping. It was surprised: "Why am I so close to the bottom of the well? "It turned out that this snail slipped down from the wall of 2 meters after falling asleep. The snail sighed, gritted his teeth and began to climb again. I climbed 3 meters at night, and the snail slipped 2 meters at night. Climb and climb, and finally the strong snail climbed up the well platform. Children, can you guess how many days it will take a snail to climb the drilling platform? 18 days.
Numeric letters
There is a man who works very hard and has good skills, but he has a shortcoming, that is, he will get drunk after drinking. Drunk, either swearing or fighting. Relatives and friends advised him to drink less or even not, but he never changed.
One day, this friend who loves drinking received a letter. When I opened it, I saw that the letter paper was full of numbers:
99 8 179 7954 76229 8406 9405 769 18934 1.29 18 17
Strange, what do you mean by so many numbers? Why is there no written explanation at all?
Is it a bill? Is it the account number and amount of the bank deposit slip? Is it a password? Is it a friend's joke or a bad guy's blackmail? More think more nervous, more think more afraid, hurry to find the right math teacher.
Take a look at it.
The math teacher read the letter carefully several times and asked, "Does your little nephew like watching TV?"
"Why don't you like watching it? You often learn to speak on TV. You speak in different ways. Call me uncle for a while and tell me to move my waist for a while. "
"Do you want to move your waist?"
"Where, nephew seal I do 00 1 sheriff! He said that the policeman on TV had a walkie-talkie and wanted to find someone with the code name 0 1, so he shouted? Move your waist? ; Call if you want to find 02? Move twice, move twice? . Yell when you see me 00 1? Move your waist? La. "
The math teacher smiled and said, "That's right. I'm afraid I'll hear the wrong number on the phone. Hole? , 1 pronounced? What? , 2 pronounced as? Two? . This letter was written by your good nephew, full of southern accent and northern accent. Let me read and listen. "
This letter full of numbers is written like this:
Uncle, don't eat wine. If you eat two glasses of wine by mistake, you will get angry or use force. If you eat wine, you will be killed by it.
Don't eat any wine. My uncle blushed to his ears and repeatedly said, "No! Do not eat! "
Interesting topic 1
1. There are 12 lighted candles on the table. First three were blown out by the wind, and then two were blown out by a gust of wind. Finally, how many candles are left on the table? 12 root
2. The fox bought a fur coat from 45 yuan in the old goat shop with counterfeit money from 50 yuan, and the old goat returned the money from 5 yuan to the fox. Do you know how much the old goat lost? 50
3, 24 people lined up, one, two, two steps forward, ask: how many people stay put? 12
There are five lights on one side of the alley. Every two lamps are 8 meters apart. How long is this alley? 32 meters
5. 10 cars line up, counting from the back, the black car is the sixth, then, counting from the back, where is it? four
Interesting question 2
1, find a normal number to write.
628、629、630、(63 1 )、(632 )( 633)
106、 108、 1 10、( 1 12)、( 1 14 )、( 1 16)
525、530、535、(540 )、(545 )、(550 )
52 1、53 1、54 1、(55 1 )、( 56 1)、( 57 1)
192、292、392、(492 )、(592 )、( 692)
2. How many different three digits can1,2,3 write? six
3. A three-digit number, the number in the hundredth place is the largest number, and the number in the tenth place is twice that in the tenth place. This number may be (9 12), (924), (936) and (948).
4. For four digits, the number of the highest digit is 2, the number of the hundredth digit is half of the highest digit, the number of the tenth digit is three times that of the hundredth digit, and the number of the unit digits is the same as that of the hundredth digit. This number is (
2 13 1)。
5. A four-digit number, the first digit on the right is 3, the third digit is 2, and the tenth digit is three times the hundredth digit. The sum of these four digits is 13. What is this four-digit number? 2623
6. Xiaodong has 10 yuan, Xiaohua has 16 yuan, and Xiaohua gives Xiaodong several yuan.
Two people have the same money? 3 yuan
Interesting question 3
1, a rope has two heads, and how many heads do three and a half ropes have? eight
2. After the second grade gives nine books to the first grade, there are as many books in the two grades. How many books are there in Grade Two than in Grade One? 18 copies
3. Two construction teams have a total of 100 people. If 20 people are transferred from Team A to Team B, then the number of the two construction teams is the same. How many people are there in each of the two engineering teams? A 70，B 30
In the world of numbers, some numbers are often arranged according to certain rules. If you can observe carefully, analyze and think carefully, you will certainly find the law and solve the problems you face.
The following is the arrangement of numbers. Can you find their rules? Which line has different rules from the other three lines? Just try it. If it suits you, I will send flowers. Don't miss the opportunity. (3) Line
( 1) 6 、 7 、 8 、 9 、 10
(2) 5 、 6 、 7 、 8 、 9
(3) 2 、 4 、 6 、 8 、 10
(4) 3 、 4 、 5 、 6 、 7
Can you find the arrangement of these numbers? When you find it, fill in the appropriate numbers in the brackets.
( 1)5、 10、 15、20、25、( 30)、(35 )、( 40)。
(2) 1、3、5、7、9、 1 1、( 13)、( 15 )、( 17 )。
(3)3、6、9、 12、 15、 18、(2 1 )、(24 )、(27 )。
(4)2、4、8、 16、32|(64 )( 128 )、( 256)。
(5)64、56、48、40、(32 )、( 24)、( 16)。
(6)960、480、240、( 120)、(60; Interesting question 4; 1. Party A, Party B and Party C stand in a row and take photos. (6) What is the arrangement? ; 2. (1)+(1) > (1) × (1) [in brackets; 3.(2)+(2)=(2)×(2)[ Parentheses must be added; 4.( 1)×(2)×(3)=( 1)+(2)+(3; 6. Mom gave Xiaoming a big box with six paper boxes in it, each paper box; 7. There is a long-distance race on the playground; Interesting question 5; 1, easy to use
(6)960、480、240、( 120)、(60 )、( 30)。
Interesting question 4
1. Party A, Party B and Party C stand in a row and take photos. (6) What is the arrangement?
2. (1)+(1) > (1) × (1) [The same integer must be added in brackets]
3.(2 )+( 2)= (2 )×( 2 )[ The same integer must be added in brackets]
4. (1) × (2 )× (3) = (1)+(2)+(3) 5. There were 10 candles in a house, and when a gust of wind blew them out, my mother closed the doors and windows. Have (
10) candles.
6. Mom gave Xiaoming a big box with six paper boxes, and each paper box has four small boxes. Xiao Ming has (3 1) boxes.
7. There is a long-distance race on the sports field. There are seven people running in front of each runner and seven people running behind each runner. There are (15) on the playground now.
) athletes.