Maths practice for 12-year-olds - page 292 of 347
Number of problems found: 6932
- Class
In the 7 C class, there are ten girls and 20 boys. Yesterday, 20% of girls and 50% of boys were absent. What percentage of students were absent? - Mesh usage
We use 540 m of mesh, of which 20% are for connecting corners. How much mesh did we use to join the corners? - Salary increase
Ms. Merry's salary increased by 15%, which was 83 euros. What should you pay before the increase? - Stew
To prepare stew for ten loggers, we need 2.5 kg of potatoes, 0.8 kg of meat, 18 dag of flour, 30 dag onion, and one bread. What is the required amount of raw materials for 50 participants in camps where loggers eat 1.5 times more than a camp participant? - Tmp workers
Three temporary workers cleaned 60 m of the walkway in 5 hours. How many meters of the walkway were cleared by seven volunteers for eight hours? - Tram lines
Trams of five lines are driven at intervals of 5,8,10,12, and 15 minutes. At 12 o'clock, come out of the station at the same time. How many hours will we all meet again? How many times has each tram passed for this stop? - Bus lines
Bus connections start from the bus stop on its regular circuit: No. 27 bus every 27 minutes and No.18 bus every half hour. If the bus stop meets at 10:15 a.m., what time do these two bus lines run? - Ambulance speed
At what speed must an ambulance travel to a traffic accident if medical assistance is provided within 20 minutes? The accident is 22 km from the ambulance station, and the witness was on the phone 5 minutes after the accident. - Least common multiple
Calculate the least common multiple of 120, 660, and 210. - Cakes
Grandmother baked cakes. Half of it was poppy, a quarter with plum jam, and 16 cheesecakes. How many cakes did she bake in total? - Octagonal mat
The octagonal mat is formed from a square plate with a side of 40 cm so that every corner cuts the isosceles triangle with a leg of 3.6 cm. What is the area of one mat? - Angles of a triangle
In triangle ABC, the angle beta is 15° greater than the angle alpha. The remaining angle is 30° greater than the sum of the angles alpha and beta. Calculate the angles of a triangle. - Bottles
Mrs. Violet brewed 15 l of raspberry juice. She poured it into 17 bottles. Some were 3/4 liter and someone liter. How many bottles were of these two types? - Sum and rounding
I know two numbers whose sum is 20. When each round and then added together, I get the 30. What are these numbers? - Roses
In a large bed of roses, one-sixth were white, half were red, one-quarter were yellow, and six were pink. How many roses were in the flower bed? - Grade average - insufficient
Classes are compared by achievement. In classes 3.A and 3.B the following grades were achieved in the subject of statistics. grade number of grades 3.A number of grades 3.B excellent 4 6 very good 10 11 good 12 9 satisfactory 5 4 insufficient 2 4 Which cl - Shell of cylinder
Calculate the area of the shell of the 1.6 m height cylinder with a base radius of 0.4 m. - Circle area
Calculate the circle area with a radius of 1.2 m. - Circle radius
What is the radius of a circle with a circumference of 28 cm? - Radius and height
Calculate the volume of the cylinder: r = 5 cm, h = 9 cm
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