Maths practice for 12-year-olds - page 31 of 167
Number of problems found: 3326
- Cube Volume from Surface
The surface of the cube is 61.44 cm². Calculate its volume. - Clock Hands Angle Ten
The hour and minute hands on the clock face make an alpha angle. If you know it's 10 hours and 12 minutes, what is the angle's size? - Construction of the road
Six trucks are supposed to be transported for 18 days to construct the road dam. After three days, the transport company sent two more cars to the construction site. How long will it take to carry the material? - Solve Linear Equation
Solve the equation with the unknown a: 3 (2a + 1) = (a-3) • 4-5 - Greg and Bill Greg is 18 years old. He is six, less than four times Bill's age. How old is Bill?
- Double and triple Find the number to which it is true: Its double is five less than its triple.
- Sum of dividend
Suppose X is divided separately into 2.63 and 1.40. The results of the individual divisions are added to give a result less than X. What is X? - Number expression comparison
Which number is 2a-b smaller than a + 2b? - Family age calculation
Dad is r years old, and Mom is two years younger. The son is 20 years younger than the father. How old are they? - Half-sphere roof
The roof above the castle tower has the shape of a 16 m diameter half-sphere. What is this roof's cost if the cost of 1 square meter is 12 euros and 40 cents? - Hemisphere of ice-cream
The ice cream maker sold 6l of ice cream a day. How many hemisphere-shaped portions with a diameter of 6 cm could he make from the ice cream sold? - Two Numbers Product Ratio
The ratio of two natural numbers is 2:3. The smaller number naturally is 12. What is the product of these numbers? - Fruit Count Apples Pears Oranges
I have 20 pieces of fruit. How many apples when pears are nine times more than oranges? - Divisor comparison calculation
How often is D (24.60) less than n (24.60)? - Concentric Circles Area
The small circle in the picture has an area of 3.5 cm². It touches from the inside and passes through the center of the large circle. What is the area of a large circle? The result round to an integer. - Secret Society Gender Ratio
There are eight boys and twelve girls in the secret society. How many boys must they accept so that the ratio of boys to girls is 3:4 - The number
What number of 1 cm cubes are required to make a 4 cm cube? - Plates - gold
The father bequeathed to his two sons 4 gold plates in the shape of a square, which were 1 mm thick. The side lengths of these plates were 5 cm, 10 cm, 10 cm, and 15 cm. The sons were to receive the same amount of gold. How many gold plates did each son r - Pool filling time
The garden children's pool has the shape of a cylinder with a base diameter of 3.2 m and a depth of 60 cm. How many hours and minutes will it fill 10 cm below the edge of 0.5 l of water per second flows through the tributary? Round to whole minutes and wr - Number axis distance Find out which numbers are seven from the number 27 on the number axis. Write their sum.
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