Maths practice for 12-year-olds - page 302 of 362
Number of problems found: 7226
- Rectangular trapezium
Calculate the perimeter of a rectangular trapezium when its area is 576 cm² and side a (base) is 30 cm, height 24 cm. - Percentage - fractions
About what percentage must we increase the number 1/6 to get the number 1/3? - Class
In the 7C class, there are ten girls and 20 boys. Yesterday was missing 20% of girls and 50% of boys. What percentage of students are missing? - Pool
The pool is filled with two water supplies. The first supply fills the pool for nine hours and the second for six hours. How many hours will it take to fill the pool when the water flows in through the first supply for three hours, and then we open a seco - Average height
In a class are 34 students. The average height of the students is 165 cm. What will be the average height of students in the classroom when two pupils, tall 176 cm and 170 cm, move from this school/class? The average height in meters of all the students i - Connecting 2990
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? - Train expres
At 8.00, the express Tatry started from Bratislava to Poprad. Cities are distant, 340 kilometers. At the same time, it started from Poprad Express Danube to Bratislava. Express Tatry's average speed is 80 km/h, Danube 90 km/h. At what distance from Poprad - 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? - Mathematics 2980
More than 20, but less than 40 pupils go to 1.S. A third of the pupils wrote the mathematics test with a one, a sixth with a two, and a ninth with a three. No one got a high five. How many 1.S pupils wrote the test with a four? - 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? - Assistance 2977
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. - Calculate 2976
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? - Is right triangle
One angle of the triangle is 36°, and the remaining two are in the ratio of 3:5. Determine whether a triangle is a rectangular triangle.
Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
