Maths practice for 12-year-olds - page 165 of 352
Number of problems found: 7021
- Line segment
Line segment AB is 8 cm long. Divide it by a ratio of 2:3. - The temperature 10
The temperature in a freezer is -15 °C, which increases by 3 °C. - Pyramid volume
Calculate the volume of a regular quadrilateral pyramid, the base edge of which measures 6 cm and the height 10 cm - The cube
The cube has a surface of 600 cm². What is its volume? - Journey route
During the three-day journey, the friends took 3/10 of the planned route on the first day and 1/4 of the intended way on the second day. How many km do they have left for the last day if the road is 80 km long? - School trip students
Pupils paid 6 b for a total of CZK 1,000 for a school trip. They paid a total of CZK 230 for the train and another CZK 35 for lunch. How many students were on the trip? - Quarter of an hour
If the clock showed a quarter of an hour more, it would be 10 minutes to 10 hours. How many hours do they show? - World travel time
The speed of the car is 23.45194840364737364738 km/h. How many hours will it take to travel around the world? - Calculate expr
Calculate the example with decimal numbers: -5 + (- 14 + 11) • [24-2 • (-0,4)] - {- 28-41 • [-8 • 2 + 4 • 1 • (0,1-2,4)] + 1} = - Prime divisor
Calculate three-fifths of the ratio of the product and the sum of all prime divisors of 240. - Point distance shape
What geometric shape do all points in the plane have the same distance from a given point in the plane? - Parentheses expression evaluation Evaluate the expression with parentheses: 12 • (-4,3) + 3 • [14- (23-4 • 5)] - 2 • {36- [18- (28-76)]} =
- An airplane
An airplane flies 1440 km in 2 1/4 hours. What is its average speed in km per hour? - Fence pole distance
The fence is built of 25 poles. The distance between the bars is 150 cm. What will be the distance between the individual poles if we make a fence of 19 poles of the same length? - Painter hiring
Twelve painters will paint all the rooms in the hotel in 75 hours. How many painters must the operating staff hire when the rooms have to be painted in 60 hours? - Map distance
On a map with a scale of 1:250000, the distance between the two mountain peaks is 32 mm. What is the actual length in km? - Length 7
Length equals 7/6 inch in width equals 7/9 inches the area is? - Dividing walnuts into crates
There are 8 and 2 over 3 pounds of walnuts in a container. The walnuts will be divided equally into containers that hold 1 and 1 over 5 pounds. This would fill n and four over 18 containers. What is n? - Alarm clock
Peter has an inaccurate alarm clock. He found that he was exactly 4 minutes late every hour. At 21:30 in the evening, he will set the exact time for it. What must alarm time be on him to wake him up at exactly 06:30? - Volume per time
The length of the cube-shaped tank edge is 4 m. A pump has a capacity of 200 l per minute. How long does it take for a pump to fill a cube-shaped tank up to 75% of its height?
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