Maths practice for 12-year-olds - page 233 of 347
Number of problems found: 6923
- The math test
The math test contains 20 problems. For each correctly solved problem, the solver gets 3 points. For each incorrectly solved or unsolved problem, 2 points are deducted. Ondrej got 25 points. How many problems did he solve correctly? - Fertilizer Dilution Ratio Water
The fertilizer bottle says: When applying during vegetation, the fertilizer must be diluted with water in a ratio of 1:5 favor of water. Mom poured a pint bottle of fertilizer into the bucket. How many liters of water should flow in? - Area of a triangle
What is the area of a triangle that has a base of 4 1/4 and a height of 3 2/3? - Glass panel
A rectangular glass panel with 72 cm and 96 cm dimensions will cut the glazier on the largest square possible. What is the length of the side of each square? How many squares does the glazier cut? - Trapezoid construction
Draw an isosceles trapezoid ABDC if a = 6 cm, v = 5 cm, beta = 60 degrees. / sketch, procedure, construction / - Ratio of sides 2
The ratio of the side lengths of one square to another is 1:2. Find the ratio of the area of the two squares. - Tank Emptying Time
The tank has a volume of 1 km cubic. Water flows out of it at a rate of 1 l / s. How long will it be empty? Thank you, we do not know what to do. - Catching Up to Truck
The truck drove out of the factory at an average speed of 60 km/h. A car drove past him in half an hour, and in an hour and a half, he caught up with him. What was the average speed, and how many km did she drive? - Bus departure
Three lines depart from the bus station at 6-minute, 8-minute, and 12-minute intervals during the morning rush hour. Once in a while, they come out at the same time. How many times between 5:30 and 8:30 does this situation occur if they first go out toget - Cycling Speed Comparison
Jerry cycled a 100-meter distance at a speed of 30 km/h. What speed would she have to go to get it in a time equal to the world record in the 100 m sprint (WR t = 9.58 s)? - Fair Payment for Work
Gardener Zemanek prepared pits in his orchard for the autumn planting of cherries, with which his sons helped him. The younger Leoš planted 70 cherries, and the older Tony planted 90 cherries. They received 400 crowns for help. How fairly did they share i - Square
Square JKLM has sides of a length of 24 cm. Point S is the center of LM. Calculate the area of the quadrant JKSM in cm². - The farmer
The farmer had 140 sheep. For the next year, she decided to change the number of sheep in a ratio of 10:7. How many sheep would he have then? - Column covering
At the foot of the house are three columns with a square base 2.5 m high and 6 dm thick. How much do we pay if we want to cover them with boards and the company charges 12 euros per 1 square meter? - The female teacher
The female teacher wrote two numbers on the blackboard under each other and called on Adam to add them. Adam correctly added them and wrote the result 39 below the given numbers. The teacher erased the topmost number, and thus the remaining two numbers fo - Dividing Rectangular Plot
Jan bought a large rectangle plot with a circumference of 90 meters. He divided it into three rectangular plots. The shorter side has all three plots of the same length. Their longer sides are three consecutive natural numbers. Find out each plot's dimens - Recipe Ingredients for Servings
According to the recipe, 0.8 kg of rice, 0.65 kg of meat, 300 g of carrots, 60 g of peas, 50 g of fat, and 10 g of salt are used to prepare 10 portions of dietary risotto. What weight of these types of food will need to be used to prepare 15 servings of r - Car Sales Amount Possibilities
They sold three Škoda cars in one day at the car dealership. After rounding the entire amount to the nearest ten thousand, the store used CZK 900,000. Please write at least five possibilities of how much they could take. - Drug Use in School
According to research, one-quarter of pupils will encounter drugs at the end of primary school. Of this number, 40% of pupils try the drug. How many students attend Year 9 if 12 have signed up to use drugs? - Chair Pressure Floor Area
The weight of the pupil and the chair is 52 kg. The area of the contact surfaces of the chair with the floor is 12 square centimeters. What pressure does the chair put on the floor?
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