Maths practice for 12-year-olds - page 98 of 347

Number of problems found: 6932

Cylindrical rod
We should grind a cylindrical rod with a diameter of 6 cm and a length of 20 cm to form a conical rod of the same size and the same base diameter. What will be the volume of material removed?
The morning 2
The morning temperature was 25°Fahrenheit. By noon, it had gone up 8°, and by 5 PM that afternoon, it had fallen 10°. What was the temperature at 5 PM?
Goods shipment delivery
During the delivery of the goods, the postman delivered one-third of the consignment on the first day, two-fifths of the rest on the second day, and 300 pieces on the third day. How many goods were in the shipment?
Circle diameter ratio
You know the ratio of the circumference of the circle to the area is 4:9. What is the circle's diameter?
Blank denominator
1/4 + 5/blank =2/3 Find a blank number.
Blank number w minus
5/2 - blank =1/3 What is the blank number?
Blank number
5/2 + blank =1/3 What is the blank number?
A recipe 3
A recipe calls for 1/2 cup of ingredient A for every 1 2/3 cups of ingredient B. You use 4 cups of ingredient A. How many cups of ingredient B do you need?
David 3
David was 1 3/5 m tall in the year 2020. This was 3/10 m taller than his height in the year 2019. What was his height in 2019?
Car plank capacity
Will a car with a load capacity of 3.5 t carry 50 oak planks and dimensions of 30 cm, 4 m, and 30 mm at a time?
Aquarium fish capacity
You need to count 3 liters of water for one fish in the aquarium. Jerry has an aquarium measuring 80 cm x 50 cm with a height of 45 cm. Determine the maximum number of fish Jerry can keep in this aquarium if the water level reaches 5 cm below the top edge
Storm distance sound
The sound travels at a speed of 1 km in 3 seconds. If the thunder is heard 12 seconds after the lightning, what distance is the storm?
Lerato
Lerato picks 400 apples from the tree in the orchard. Lerato bottles 4/10 of the apples, use 1/8 of the apple in pie, and sells 3/20 of the apples. A, How many apples does Lerato sell? B, How many does she bottle? C, How many apples does she use in the pi
Alice 3
Alice has R50 and spends 4/5 of her money. How much does Alice spend?
At a party
There are 16 people at a party, and 3/4 of the people drink orange juice. How many people drink orange juice?
Learnes
There are 800 learners in a school. 7/8 of the learners walk to school. How many learners walk to school?
Wooden 3
A wooden board 2.5 m long has a cross-section in the shape of a right-angled trapezoid whose parallel sides are 1.2 dm and 8 cm long. The height of the trapezoid is 3 cm. Calculate: a) the surface area of the board, to determine the amount of stain needed
Cottage temperature evening
They measured a temperature of +2 degrees Celsius at noon on May 5 at the cottage near Popradsky Lake. For dinner, it dropped 10 degrees Celsius. How many degrees were there in the evening?
Sofia
Sophie has 6 candy bars. She gives her friend 4/5 of a candy bar and eats 2 1/9 candy bars. About how many candy bars does Sophie have left?
A rectangular 6
A rectangular sheet of paper is 6 2/3 cm long and 4 1/2 cm wide. Find its perimeter.

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