Maths practice for 12-year-olds - page 202 of 347
Number of problems found: 6923
- Student sport participation
Of 34 pupils, 17 skis and 21 skates, 12 practice both sports. a) how many students from the class ski or skate? b) how many students from the class ski but do not skate? c) how many students from the class do not skate or ski? - Flower bed
The park has a rectangular flower bed with dimensions of 3.2 m and 1.5 m. 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? - Cheese kilogram cost
20 dkg of cheese costs 40 CZK. How much does 1 kg of cheese cost? - Cup milk filling
How many cups with a volume of 2.5 deciliters will you fill from 1 liter of milk? - Grandfather pond time
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? - Reserve map scale
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 equation solving
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. - Bicycle pursuit calculation
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? - Car distance calculation The car's speedometer showed a constant speed of 60 km/h for 5 minutes. What path did the car cover during this time?
- Diamond area calculation
Calculate a diamond's area with a circumference of 51.2 cm and a height of 9.6 cm. - Garden scale area
The garden has an area of 5000 m². What is its image area on a 1:1000 scale on the plan? - Carrot apple cost
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? - Car speed compliance
Police found that the car had traveled 300 m in 20 seconds. He complied with the driver's maximum allowed speed of 50 km/h - Proportion 3
For every eight mango trees in the orchard, there are 4-star apple trees. If there are 1320 trees, how many trees of each kind are there? - Plot dimension calculation
The rectangular plot has dimensions of 48 mm and 72 mm on the plan on a scale of 1:5000. Calculate its dimensions and give the results in meters.
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