Maths practice for 11-year-olds. - page 189 of 221
Number of problems found: 4414
- 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? - 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? - 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 - 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? - Circle diameter
What is the diameter of a circle with an area of 35 cm²? - Circle length
Calculate the length of a circle with a diameter of 7 cm. - Tablecloth
The table top is 90 cm long and 50 cm wide. How many cm of lace edging is necessary for the tablecloth that hangs on each side by 10 cm? - Carpet tape
Mr. Svoboda has 25 m of carpet tape at home. He wants to hem the carpet measuring two times 2 m and three times 4 m. Does he have enough tape? - Text messages
If the amount for the last text messages in one month with the mobile operator MOBY exceeds 14 euros (it costs 100 cents), each additional text message costs 13 cents. a) From what time does the price of a text message become 13 cents? b) How much does it - Foot in bus
It was 102 people on the bus. Twenty-eight girls had two dogs. Eleven girls had one dog. Five dogs (even with their owners) seceded at the next stop. They got two boys together with three dogs. The bus drove one driver. How many feet were on the bus? - Expression equals 100
Write any numeric expression whose value is 100 and will contain at least four different mathematical operations. - Sound travel
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. - Even / odd numbers
a / Using variable n, write two consecutive odd numbers. b / The sum of three consecutive odd numbers is 333. What are these numbers? - Moneys in triple ratio
Milo, John, and Lili have a total of 344 euros. Their amounts are in the ratio of 1:2:5. Determine how much each of them has. - Ages
John, Teresa, Daniel, and Paul have a summary of 56 years. Their ages are in a ratio of 1:2:5:6. Determine how many years each has. - Bricks wall
There are 5000 bricks. How high wall thicknesses of 20 cm around the area, which has dimensions of 20 m and 15 m, can use these bricks to build? Brick dimensions are 30 cm, 20 cm, and 10 cm. - Vitamin content
To complete valuable nutrition, a person needs vitamins that support physiological processes in the body and have a protective function. One of the most important vitamins is vitamin C. The recommended dose for adolescents is 70-90 mg per day. Calculate h
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