Maths practice for 12-year-olds - page 258 of 307
Number of problems found: 6129
- 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. - 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.
- 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? - 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. - Diameter 2949
What is the diameter of a circle with an area of 35 cm square?
- Calculate 2948
Calculate the length of a circle with a diameter of 7 cm. - Calculate 2946
The block's surface area is 94 cm². The lengths of its two edges are a = 3 cm and b = 5 cm. Calculate the length of its third edge. Let's say: From the formula for the block surface, first calculate c. - Cylindrical 2945
The cylindrical plastic container has a bottom diameter of 2 dm. How tall must the container be to hold 5 liters of water? - Determine 2944
Determine an unknown number. Its double is equal to its triple less 1.5. - Perimeter of circle
Calculate the circumference of a described circle to the triangle with sides 9,12,15 cm.
Sound travels in the air at a speed of about 330 m/s. Make a table of the dependence between the time (after one second), and the sound's distance travels during this time. During a storm, you can easily find out how far you are from it.Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.
