Maths practice for 12-year-olds - page 213 of 351

Number of problems found: 7018

Number axis distance
Find out which numbers are seven from the number 27 on the number axis. Write their sum.
Pages counting
There are pages numbered 2 to 104 in the book. How many digits have to be printed to number the pages?
Dividing a Circle
Draw a circle k, r = 4 cm, and divide it into two parts in a ratio of 1:5.
Jill's
Jill's mom stored some of the honey in a container containing 3/4 of a gallon. She used half of this amount to sweeten tea. How much was honey in the cups used in the tea? Express your answers in cups.
Aquarium
Can 30 liters of water fit in a cuboid aquarium with dimensions a = 3dm b = 6dm c = 5dm?
On Sunday
On Sunday, the temperature reached a high of 38° above 0. That night it dropped to 23° below 0. What is the difference between the high and low temperatures for Sunday?
Ribbon on the cube
A cubical gift box is tied with a piece of ribbon. If the total length of the free ends and the bow is 18 inches, what is the length of the ribbon used? (Each side of the cube is 6 inches).
Workers - earning
Twelve workers would earn € 800 in 10 days. How many euros would 14 workers earn in 8 days?
Which
Which decimals, when subtracted, equal 3.89: a - b = 3.89
Soccer team
Hilahs soccer team is trying to raise $2414 to travel to a tournament in Florida, so they decided to host a pancake for breakfast. How many people need to attend their breakfast to raise $2414 if the profit per pancake is $1.5?
Under the sea
In Jules Verne's famous novel "Twenty Thousand Leagues Under the Sea", three heroes – professor Aronnax with his servant Conseil and the harpooner Ned Land – experience a journey by submarine Nautilus under the command of captain Nemo. Suppose that the av
Diameter of a cylinder
The diameter of the cylinder is 42 cm. How many times does the cylinder turn on a 66 meters long track?
Laboratory
Mang Elio went to his laboratory at 7:00 AM and recorded the temperature as 11.07°C. At lunchtime, the temperature rose by 27.9°C but dropped by 8.05°C at 5:00 PM. What was the temperature at 5:00 PM?
School year seconds
Calculate how many seconds the teaching lasts for the whole school year and write in the form a * 10^n
Steamers Meeting Time
Three steamers leave the port. The first regularly returns after three months, the second after four, and the third after six months. How long before they meet again in the port?
Circles Screen Appearance Rate
The monitor screen is blank. Four new wheels appear on the screen every seven seconds when the beep sounds. On the contrary, three wheels disappear from the screen every eleven seconds. If both actions should take place simultaneously, the number of circl
Cylinder height calculation
What is the height of the cylinder if the volume is 8,478 cubic meters and the area of the base of the cylinder is 706.5 cm square?
Wire thickness calculation
The wire is wound into several turns. The thickness of 10 threads is 1 cm. Calculate the wire thickness.
Two gears
The two gears fit together. The larger gear has 32 teeth. The smaller gear has 20 teeth fewer. How many times does turn a smaller gear if the bigger gear turns three times?
Quintuplets
The quintuplets (Ela, Hela, Jela, Žela, and their brother Belo) wanted to divide a round cake fairly among themselves. As they could not cut it into five equal parts, Belo suggested to his sisters: "Divide the cake among the four of you into equal parts.

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