Maths practice for 11-year-olds. - page 190 of 222
Number of problems found: 4421
- 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 - Fraction equation
Solve the equation: 5-y / 3-6-4y / 5 = 0 - Purchase - store Mom bought in the store 3 kg of sugar for Sk 19.50, two milk for Sk 13.10, bread for Sk 17.60, 20 eggs for Sk 2.55, salami for Sk 138.75, and oranges for Sk 42.80. She had 728.35 SK in her wallet before the purchase. How many crowns did she have left afte
- Whale weight
The largest mammal and animal ever is the giant flounder, which weighs up to 160,000 kg. How many times is heavier than a weighing elephant 4,000 kg? - Cigarette consumption
In 1983, the world produced 27 million cigarettes and cigars. If one person smokes 20 cigarettes a day, how many people smoked a day in 1983? - Population growth
The world's population is growing by 94,867,200 each year. How much is it a) month, b) day, c) hour, d) minute? - Elephant population
In 1979, 1.3 million elephants lived in Africa. By 1989, their number had dropped to 600,000. On average, how many elephants have died each year during this period? - Water level
To cuboid-shaped poll, bottom size 2 m and 3.5 m, flows water at a rate of 50 liters per minute. How long will it take for water to reach a level of 50 cm? - Father and sons age
The father is 56 years old, and his sons are 25 and 19 years old. In how many years will the father's age equal the sum of his sons' ages? - Kerosene volume
What is the volume of kerosene if its weight is 8g? The density of kerosene is 780 g / l - Wooden pegs
From two wooden poles 240 cm long and 210 cm long, it is necessary to cut pegs of the same length as long as possible so that no residue remains. How many such pins can be cut? - Train distance
The passenger train is 60 km from the destination station and runs at a steady speed of 54 km/h. How far will it be from the destination station in 45 minutes? - Acting
Two locomotives are used in a train set. One locomotive pulls the train and the other pushes it. The pulling locomotive exerts a force of 500 kN on the train, and the pushing locomotive exerts a force of 400 kN. a) Draw a diagram of the described situatio - Square area
The perimeter of the square is 380 dm. What will be its area? - Speed comparison
Arrange the listed speeds from smallest to largest: Š - The sprinter will run 60 meters in 7 seconds, L - chairlift passes 180 meters in 2 minutes, A - the car travels 35 km in half an hour, H - hippo, during the attack, runs 50 meters in 60 seconds. - Expression calculations
Calculate: a / 2 + 3 * 4 - 5 * 4 + 3 b / 2 + 3 * (4 - 5) * (4 + 3) c / 2 + [3 * 4 - (5 * 4 + 3)] d / {2 + [3 * (4 - 5)] * 4} + 3 e / 2 + {3 * [4 - 5 * (4 + 3)]} - Map distance
On a map with a scale of 1:50,000, we measured the distance of places AB = 136 mm. The actual distance between cities A and B is:
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