Maths practice for 12-year-olds - page 201 of 347
Number of problems found: 6923
- Continent area proportion
The area of Asia and Africa is 3:2, and the area of Europe and Africa is 3:7. In what proportion are the sizes of Asia, Africa, and Europe? - Four-digit number
Find all four-digit abcd numbers with a digit sum of 12 such that ab-cd = 1 - Jared's room painting
Jared wants to paint his room. It is 12 feet by 15 feet and has walls 9 feet high. Two windows measure 6 feet by 5 feet each, and two doors measure 30 inches by 6 feet each. If a gallon of paint covers approximately 350 square feet, how many gallons will - Rainwater
If 6 mm of water rained on the garden with an area of 25 acres, how many 12-liter cans of water would we need to water this garden? - Trolley approach speed
Two trolleys cross the platform at the station facing each other. One of them travels at a speed of 10.2 km/h, the other at a constant speed of 7.8 km/h relative to the platform. At what speed is the driver of the first cart approaching the driver of the - Athletic race
Before a race, you start 4 5/8 feet behind your friend. You are 3 2/3 feet ahead of your friend at the halfway point. What is the change in distance between you and your friend from the beginning of the race? - Martha
Martha likes to walk in the park, which is square, 7/10 mi on each side. One morning, Martha walked around the entire park 3 1/2 times before stopping to rest. How far had she walked? - Garden perimeter calculation
The garden is a rectangle, 800.25 square meters in area. Calculate the garden's perimeter if its length is 48.5 m. - Simple equation 9
Solve the following equation: -8y+5=-9y+9 - Painters
Ten painters will paint the school in 20 days. How many days do four painters paint the school at the same pace of work? - Flowerbed area calculation
What is the area of the round flowerbed, whose circumference is 62.8 m? How many edges does it have? - Mother and daughter
The mother is 44 years old, and her daughter is 14. How many years ago was the mother four times older than her daughter? - Pool painting cost A square-shaped pool with bottom dimensions of 7 m * 4 m and a height of 1.2 m needs to be painted. How much will the paint cost if 1 kg of paint, which is enough for 6 m² of color, costs 3 euros? The painter charges 1 euro for coating 1 m².
- Wooden container
The locksmith should cover the cube-shaped wooden container with a metal sheet inside. The outer edge of the container is 54cm. The wall thickness is 25 mm. The container has no lid. Calculate. How many sheets will be needed to cover it? - Chauncey
Chauncey is building a storage bench for his son's playroom. The storage bench will fit into the corner and against two walls to form a triangle. Chauncy wants to buy a triangular-shaped cover for the bench. Suppose the storage bench is 2 1/2 ft along one - Fraction + eq
Solve following simple equation with fractions: -5/6(8+5b) = 75 + 5/3b - Divide
Divide 72 by 7:2, calculate the ratio of the numbers found in this order, and write it down as a decimal. - The glass
1 m³ of glass weighs 2600 kg. Calculate the weight of the glass glazing panel with dimensions of 2.5 m and 3.8 m if the thickness of the glass is 0.8 cm. - Cylinder painting cost
How many kg of paint do we need to paint a cylinder with a diameter of 60 cm and a length of 2 meters if we use 0.5 kg of color for one square meter of surface? How much will we pay for paint if 1 kg costs CZK 165? - Play tennis
Peter and George agreed to go play tennis. Peter's path to the tennis court is 800 meters longer and leads around George's house. Peter comes out first and then picks up George. Together they go at the same average speed as Peter went, so they reach the p
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