Interesting math problem (1) of grade six in primary school (1) at the get-together of class six (3)? Guess? There are 10 questions in the contest, and it is stipulated that 1 is correct and 1 is wrong, and 5 points are scored. 8 points, no answer 0 points, Lingling * * *, 12 points. How many questions did she answer correctly? How many questions did you answer wrong?
(2) If the lateral expansion of a cylinder is square, how many times is the height of the cylinder the radius of the bottom surface of the cylinder?
(3) After cutting a 2-meter-long steel bar into two sections, the surface area increased by 6.28 square centimeters. How many cubic centimeters is the volume of this steel bar?
(4) The school bought a bundle of plastic rope, which was 135 meters long and cut 27 meters to make 15 skipping rope. According to this calculation, how many skipping ropes can be made from the remaining rope?
(5) Brother 100 yuan, brother 80 yuan. How much money does the elder brother give to the younger brother? The ratio of money between the two brothers is 7: 1 1?
(6) Mix red, white and blue flags with 10. If you close your eyes and take it, how many flags can you take at a time to ensure that the two flags must be the same color?
(7) There were 129 people attending the meeting. If you shake hands with everyone once, then you shake hands () times.
(8) Put seven kittens in three cages. No matter how you put it, there will always be at least () cats in a cage.
(9) use? 2? 、? 7? 、? 8? 、? 5? What about three? 0? Form one? 0? The minimum number of seven digits you don't read is ().
(10) If the perimeter of a square and a circle is the same, the area of () is the largest.
Wang Fang and Li Gang each have a few dollars. If Wang Fang gave Li Gang what she originally owned, and Li Gang gave Wang Fang what he originally owned, then their money was exactly equal. The proportion of money each of them has is ().
(12) A line segment divides a rectangle into two parts, and four line segments can divide a rectangle into () parts at most.
Two shepherds are herding sheep. A said to B: Give me your sheep 1. My sheep are exactly twice as big as yours. ? B said to a:? You'd better give me 1 sheep, so that the number of your sheep is equal to mine. ? Excuse me, A has () sheep and B has () sheep.
(14) The price of 7 kg apples and 4kg pears is similar, and the price of 1kg pears is higher than that of 1kg apples in 0.6 yuan. How much are pears and apples per kilogram?
(15) There are two bags of sugar, one with 84 pieces and the other with 20 pieces. Take 8 pieces from the extra bags and put them in fewer bags at a time. How many times do you have to eat to make these two bags of sugar equal?
Interesting math problems in the sixth grade of primary school (middle) 1. 0.25= ()? 12 = 24/() = () = () fold
Miss Li asked the students to guess her house number. Her house number is three digits, the smallest composite number in the hundred digits, the smallest prime number in the ten digits, and the largest single digit in the digits. Miss Li's house number is ()
There are eight yellow, red and blue chopsticks in the bag. They are exactly the same except for the different colors. Now at least take out () pairs of chopsticks from the bag to ensure two pairs of chopsticks with different colors.
4. Add appropriate operation symbols and brackets to make the equation hold.
9 9 9 9 9 = 12
9 9 9 9 9 = 20
There used to be 12 lighted candles on the table. First three were blown out by the wind, then two were blown out by a gust of wind, and finally there were () candles left on the table.
6. Xiaohua's father can cut off five of his own nails in 1 minute. He can cut his nails in five minutes.
7. There are 25 rabbits and 90-legged chickens. There are () rabbits and () chickens.
8. Xiao Zhang and Xiao Wang live in the same building, and the number of stairs between two adjacent floors of this building is the same. Xiao Zhang lives on the fourth floor and takes the 54 stairs to go home. Xiao Wang lives on the eighth floor and takes the stairs to go home.
After the fraction of 9.5/7 is converted to decimal, the number at the1993rd place after the decimal point is ().
10. There are 14 students in a certain group, and at least () students have birthdays in the same month.
1 1. Cousin is older than Xiaoming 19 years old, just three times older than Xiaoming, and Xiaoming is () years old.
12. The production team randomly selected 500 products and found that the qualified rate was 98%. The simplest ratio between qualified products and unqualified products is ().
13. The diameter of a big circle is three times that of a small circle, the ratio of the perimeters of the big circle and the small circle is (), and the ratio of the areas is ().
14. A, B and C race, and A, B and C predict the result of the race. A said:? A must be the first place. ? B said:? A is not the last one. ? C said: A is definitely not the first place. ? Only one of them correctly predicted the result of the game. This prediction is correct ()
15. One day, a young man came to Wang's shop to buy a gift. The cost of this gift is 18 yuan, and the price is 2 1 yuan. As a result, the young man took out 100 and bought this gift. Boss Wang didn't have any change at that time, so he changed 100 yuan from the neighborhood and gave it to the young man 79 yuan. But later, the neighborhood found that this 100 yuan was counterfeit, and Boss Wang had no choice but to return this 100 yuan to the neighborhood. Boss Wang finally lost () money in this transaction.
Second, I can do it (5 points for each question)
1. Simple calculation
? ( 198+32? 72)? 2472? 24 ? 7.8? 1/5+2.2? 20%
? 3333? 3333+9999? 8889 ? 2009/20 10? 20 1 1
The number of cattle is 25% more than that of sheep. What percentage is the number of sheep less than that of cattle?
3. A section of road is 30 kilometers long, and it takes 15 days for Team A and 15 days for Team B. How many days can the two teams fix it together?
4. There are three workshops 180 people in a factory. The number of people in the second workshop is three times that in the first workshop, exceeding 1 person, and the number of people in the third workshop is half that in the first workshop, but less than 1 person. How many people are in each of the three workshops?
Three years later, the two brothers are 26 years old, and the younger brother's age this year is exactly twice the age difference between the two brothers. Q: How old are the two brothers after three years?
6. On March 12, the school organized students to plant trees along the west bank of Longxi Port and plant a tree every 8 meters from north to south. If two people plant a tree together, * * * needs 3 12 people. How long is Longxi Port?
7. Suppose there is a pond with infinite water. At present, there are two empty kettles with a capacity of 5 liters and 6 liters respectively. The problem is how to get 3 liters of water from the pond with only these two kettles.
8. The circular runway is 800 meters long. Runway A runs at a speed of 4 meters per second, and B rides at a speed of 4 times that of A, both of which start from the same place and direction at the same time. How long will it take them to start from this starting point?
Interesting math problems in the sixth grade of primary school (Volume II) 2 1. The length of a round metal wire is 30m. Three metal wires with length A and five metal wires with length B are intercepted. If two metal wires with length B are intercepted, the remaining metal wires are still missing 0. 4 meters, if you intercept two more metal wires with a length, you will lose 2 meters. How many meters is the length a equal to?
22. A company wants to transport two kinds of building materials, A and B, to the construction site. Building materials A weigh 700kg each, * * has 120 pieces, building materials B weigh 900kg each, and * * has 80 pieces. It is known that a car can transport up to 4 tons at a time, so how many times do five identical cars have to be transported at the same time?
23. The distance from Wang Lijia to the school is longer than the distance to the gymnasium 1/4. One day, Wang Li watched the game in the gym and walked home in 17 minutes. After a short rest, it took him 25 minutes to walk to school, which was slower than coming back from the gym 15 meters. How far is it from Wang Lijia to school?
24. Master and apprentice cooperate to complete a project. Because of their good cooperation, the master's work efficiency is higher than that of the apprentice110 and higher than that of the apprentice 1/5. Two people worked together for six days, completing two-fifths of the whole project, and then the apprentice worked alone for six days. At this time, the project still has 13/30 unfinished. If the project is done by the master alone, how many days will it take to complete?
25. Students in five classes of Grade Six planted 100 trees. It is known that the number of trees planted in each class is different, and the order from more to less is exactly 1, 2, 3, 4 and 5 classes. It is also known that the number of plants in class one is the sum of the number of plants in class two and class three, and the number of plants in class two is the sum of the number of plants in class four and class five. So how many trees can Class Three plant at most?
26. A runs 13 km per hour, B runs 1 1 km per hour, and B runs 20 minutes longer than A. As a result, B runs 2 km longer than A. How many kilometers did Manager B run?
27. There are two cylindrical containers, A and B, with the same height, and the inner mouth radii are 6 cm and 8 cm respectively. Container A is full of water and container B is empty. Pour all the water in container A into container B, and the water depth in container B is 2 cm lower than 7/8 of the container height. How many centimeters is the height of this container?
28. The cargo 104 tons is transported by 9-ton truck. It is known that a car needs 1 hour for each round trip. In fact, every time the car is loaded 1 ton, it can be completed a few hours in advance.
29. On the first day, master and apprentice processed 225 parts, and on the second day, new technology was adopted. The number of parts processed by the master increased by 24% compared with the first day, and the number of apprentices increased by 45%. Two people processed 300 parts. How many parts did the master process the next day? How many parts did the apprentice process?
The admission rules for liberal arts in Changchun University of Technology in 2022 have been announced. The following is the