Maths practice for 12-year-olds - page 101 of 353

Number of problems found: 7043

Nina used
Nina used 2 liters of paint to paint a wall. The wall was a rectangle 2 meters high and 4 meters wide. How many liters of paint would she need to paint a rectangular wall which is 2.5 meters high and 8 meters wide?
Ava filled
Ava filled three cups with different amounts of water: 225 ml, 370 ml, and 435 ml. Which of the following is the total amount of water, in liters, that Ava used to fill the three cups?
A seller
A seller sliced some pizza into eights. After selling 57 slices, seven slices were left. How many whole pizzas did the vendor slice?
Four-sided prism
Find the surface area and volume of a four-sided prism high 10 cm if its base is a rectangle measuring 6 cm and 1.4 dm.
A rhombus 3
A rhombus has a side length of 6 centimeters and a height of 2 centimeters. What is the area of the rhombus in centimeters square?
Ron walked
Ron walked 3 3/4 km on Monday, 4 1/3 km on Tuesday, and 2 7/12 km on Wednesday. What distance did he walk in all?
Fabric length
Meg has 5 3/4 yd of fabric. She needs 1 1/8 yd to make a vest and 2 1/2 yd to make a skirt. How much fabric will be left for a jacket?
Beef burger resources
In the meat atlas published by the Jindřich Boll Foundation, it is stated that one kilogram of meat requires 6.5 kg of grain, 36 kg of feed mixture, and 15 cubic meters of water. Laura's slice of beef in the burger weighed 45 grams raw. How many kilograms
Consecutive number groups
Determine the group of numbers for which the following relations hold: a) The sum of the searched three consecutive even numbers equals 978. b) The sum of the searched four consecutive odd numbers equals 312.
Possums
1/3 were kangaroos, 2/5 were wallabies, and the rest were possums. What fraction of the animals were possums?
Janka Katka meeting
Jane and Kate live in villages 16 km away. They agreed to meet precisely halfway. Jane was driving at a speed of 4 km/h. Kate came out 30 minutes later. At what speed must Kate drive to fulfill the agreement?
Container volume surface
The cube-shaped container has a surface area of 320 square centimeters without a lid. Calculate its volume.
Aquarium water level
How high is the water level in the aquarium, which has the dimensions of a base of 80 cm and 45 cm, if there are 72 liters of water in it?
Clearance - vacation
The Sobotka family checked their suitcases before leaving on holiday. Their four suitcases had weights in the ratio 3:4:5:8. The total weight of all four suitcases was 60 kg. The maximum allowed weight per piece of luggage is 25 kg. a) Calculate the weigh
How many 21
How many tiles of 2 m by 2 m in size can fill the floor of a room with a size 16 m x 12 m?
The perimeter 8
The perimeter of a rectangle is 40 cm. If its width measures 5 cm, what is its area?
A piece 5
A piece of cloth is laid at the center of a table 80 cm long and 60 cm wide, and it leaves 5 cm all around. Find the area which is not covered by the piece of cloth.
Drawer volume surface
A cube-shaped container has a surface area of 405 dm². Calculate its volume.
Stamp collection total
In his stamp collection, Randy had half of the Czech stamps, a third of Slovak stamps, and just 128 overseas stamps. Randy did not collect any other stamps. Calculate how many stamps Randy had in the collection.
Number comparison times
Calculate how many times six-hundredths is greater than 12 ten-thousandths.

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