Maths practice for 12-year-olds - page 203 of 351
Number of problems found: 7018
- 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. - Eq-frac
Solve the following equation with fractions: h + 1/3 =5/3 - The temperature 3
The temperature is -12 degrees Fahrenheit. During the following 5 hours, the temperature decreased by 23 degrees Fahrenheit. What is the weather like at 11 pm? - Stock market 2
For the week of July 22, the forecaster recorded the following day-to-day changes in the stock market of a specific stock: -2 on Monday, +4 on Tuesday, -8 on Wednesday, + 2 1/2 on Thursday, - 3 1/4 on Friday. The stock began the week at 78 points. How man - Polynomial equation solving
Solve the equation with the polynomial: x / 2 + 1/2 + 3 = x - Diameter of a cylinder
I need to calculate the cylinder volume with a height of 50 cm and a diameter of 30 cm. - Fruits 2
An apple costs 7p, and a melon costs seven times more. How much will six apples and two melons cost? - The quotient of two numbers
Find the quotient of 229.12 and 12.32 - Spending
Peter spends 1/5 of his earnings on his rent, and he saves 2/7. What fraction of his earnings is left? - Cube volume function
Express the volume of a cube as a function of its edge size. - One third
If 3/5 is 360, how much is 1/3?
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