Maths practice for 12-year-olds - page 200 of 350

Number of problems found: 6986

Flower bed
The park has a rectangular flower bed with dimensions of 3.2m and 1.5m. How many rose bushes will we plant in the flower bed if 20 dm² are needed for one bush?
Age question
Jano is three times older than Zdeno. Zdeno is 12 years younger than Janko. How old is Jano, and how old is Zdeno?
RPM
An electric motor makes 3,000 revolutions per minute. How many degrees does it rotate in one second?
Athletic club
All athletic club boys lined up by size. In front of Peter was one-eighth of the total. Right behind Peter stood his brother Radek and behind Radek, another five-sixths of the total number of boys. Mark the unknown total number of athletic club boys x. 1,
Cheese 9051
20 dkg of cheese costs 40 CZK. How much does 1 kg of cheese cost?
Deciliters 9041
How many cups with a volume of 2.5 deciliters will you fill from 1 liter of milk?
Grandfather 9001
Grandfather left the house on his bicycle at 1 p.m. He drove to the pond and returned home at 3:20 p.m. There and back, he rode the same road across the plain. He stayed at the pond for 1 hour. How many minutes did it take him to get to the pond?
Kilometers 8991
The nature reserve covers an area of 40,000 square kilometers. If we draw it on a map on a scale of 1:1000000, we get a square. Find the side of the square on the map.
Interesting 8981
Solve an interesting equation: (1 * x) + (2 * x) + (3 * x) + (4 * x) + (5 * x) + (6 * x) = 100
Two parts journey
The driver of the car plans to drive 30 km in 0.5 hours. For 20 minutes he follows the convoy (traffic jam) at a speed of 30 km/h. What speed would he have to go in the remaining time?
Steel tube
The steel tube has an inner diameter of 4 cm and an outer diameter of 4.8 cm. The density of the steel is 7800 kg/m³. Calculate its length if it weighs 15 kg.
Forty-eight 8861
Forty-eight pupils go to school; there are ten boys more than girls. How many girls go to school?
Orienteering 8851
The first patrol of the pupils' orientation run started at 8 a.m. at an average speed of 5 km/h. At 8:36 AM, the leader of the orienteering race followed them on a bicycle at a speed of 20 km/h. When and how far from the start will he catch up with them?
Sales off
After discounting 40%, the goods cost 15 €. How much did the cost of the goods cost before the discount?
Speedometer 8781
The car's speedometer showed a constant speed of 60 km/h for 5 minutes. What path did the car cover during this time?
Circumference 8771
Calculate a diamond's area with a circumference of 51.2 cm and a height of 9.6 cm.
5000 8761
The garden has an area of 5000 m². What is its image area on a 1:1000 scale on the plan?
Kilograms 8741
Mom bought 4kg of carrots for 1 euro 30 cents and 3 kilograms of apples for 2 euro 10 cents. How much did she pay for carrots and apples?
Three-quarters of its volume
The pool is a block shape with a length of 8m, a width of 5.3m, and a depth of 1.5m. If it is filled to three-quarters of its volume, how many hectoliters of water are in it?
Complied 8661
Police found that the car had traveled 300m in 20 seconds. He complied with the driver's maximum allowed speed of 50 km/h

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