1. Primary school math brainstorming Orsay I
1. There are two bridges on the Yellow River, one high and the other low. Both bridges were flooded three times in a row. Gao Qiao was flooded three times, while the short bridge was only flooded 1 time. Why?
Step 2 buy a hat
Two fathers and sons went to buy hats. Why did they only buy three?
3. Combined figures
Can three cards of 2, 1 6 be arranged into an integer divisible by 43?
Step 4: Cross the bridge
The height under the bridge can only be limited to ten meters, but the cargo on board has exceeded ten meters. What should I do?
5. Guess this number
A number removes the first number 13 and the last number 40. What is this number?
2. Primary school math brainstorming Olympic Games II
1. The doctor gave you three pills and told you to take one every half hour. How long will it take to complete? 2. The news published in the newspaper may not be true, but what news can never be false?
3. How to cut a watermelon into 9 pieces with 4 knives?
4. Xiao Han's mother irons clothes. It takes 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 for Han provided's mother to iron it all?
5. It takes three minutes for three children to eat three cakes, and how long does it take for ninety children to eat ninety cakes?
6. A tailor has a piece of cloth, which is16m long. She cuts off two meters from it every day. How many days later, she cut off the last piece of cloth?
Xiaoli and her mother bought 8 apples. Her mother asked Xiaoli to put these apples into five pockets, and each pocket was even. Can you do it?
8. At a banquet, a couple shook hands with the guests 48 times and asked how many people were at the banquet.
9,4+4+4+4 (guess a fruit)
10, someone bought a toy for 19 yuan and sold it to 20 yuan. He didn't think it was cost-effective, so he spent 2 1 yuan on it and sold it in 22 yuan. How much did you earn?
3. Elementary School Olympic Geometry Question 3
1, a cuboid wood, its cross section is a square with a side length of 0.2m and a side length of 4m. 15 what is the volume of this piece of wood? _____________________________________
2. A rectangular tea cone, 8 cm long, 8 cm wide and 18 cm high. The trademark paper is stuck around. How many square centimeters is the area of this trademark paper?
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The carriage of the truck is a cuboid. The carriage is 3 meters long, 2 meters wide and 0.8 meters high. What is its volume?
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4. There is a cuboid oven welded with iron sheet, with a side length of 6 decimeters, and a layer of antirust film is electroplated inside and outside (ignoring the thickness of iron sheet). How many square meters is the electroplating area?
_____________________________________
5. Use 24 small cubes with length 1 cm to form cuboids with different shapes. How many kinds can you put? What are the length, width and height areas of each cuboid?
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4. Primary school Olympic geometry problem 4
1, two () form an angle from a point. First, straight line
B, line segment
C, ray
2. A quadrilateral has only one set of parallel sides, and this quadrilateral is ().
I. Parallelogram
B, arbitrary quadrilateral
C, trapezoid
3. After the rectangle is drawn into a parallelogram with four equal sides, its area is ().
Bigger than before.
B, smaller than before
C, equal to the original
4. Use two equal-length iron wires to form a square and a circle respectively. Compared with the area of a circle, the area of a square ().
This square has a large area.
B, the same size
C, the area of the circle is large
5. Primary school Olympic geometry problem 5
1, the length of the rectangle is 23 meters, the width is 16 meters, and what is the circumference? 2. The circumference of a rectangle is 46 decimeters, the length is 17 meters, and the width is what?
3. The circumference of a rectangle is 86 cm, the width is 8 cm, what is its length?
4. Square orchard with side length of 104m. What is the circumference of this orchard?
The circumference of a square handkerchief is 48 cm. How long is the edge of the handkerchief?
6. The circumference of a square is as long as that of a rectangle. The side length of a square is 12 decimeter, and the length of a rectangle is 18 decimeter. What is the width of this rectangle?
7. The rectangular playground is100m long and 40m wide. How many meters does it take to run around this playground twice?
8. A rectangular vegetable field, with a length of18m and a width of 9m, is surrounded by a wall on one side and bamboo fences on the other three sides. How long is the bamboo fence?
9. A 60 cm long wire is surrounded by a square. What is the side length of this square?
10, the perimeters of a rectangle and a square are equal, the length of a rectangle is12m, and the width is 8m. How long are the sides of this square?
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