Maths practice for 12-year-olds - page 300 of 348
Number of problems found: 6960
- 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. - Physiological 2914
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 - Equation: 2913
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 - Population 2909
The world's population is growing by 94,867,200 each year. How much is it a) month, b) day, c) hour, d) minute? - Playground 2908
The fencing of the square playground cost € 462, while the 1m fencing cost € 11. What is its playground area? - Water level
To cuboid-shaped poll, bottom size 2m and 3.5m, flows water at a rate of 50 liters per minute. How long will it take for water to reach a level of 50 cm? - Together 2904
The father is 56 years old, and his sons are 25 and 19 years old. How long will the father be as many as his sons together? - Kerosene 2897
What is the volume of kerosene if its weight is 8g? The density of kerosene is 780 g / l - Necessary 2895
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? - Destination 2894
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? - Expression 2892
Add to expression 1 + 2x3 - 4x5:6 a / one pair of brackets so that the result is as large as possible b / one pair of brackets so that the result is as small as possible - Chairlift 2886
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. - Cat show
A total of ten exhibitors gathered at the long-haired cat show. It was exhibited in a rectangular room with two rows of tables, as shown. The cats were marked with different numbers from 1 to 10, and one cat sat on each table. Determine which cat was rate - Calculate: 2884
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)]} - Denominator 2883
Write a fraction with a denominator of 200 greater than 0.39 and less than a two-fifths fraction. Write its numerator x. - Non-payment 2882
The hotel's payment for electricity after non-payment of the original payment was increased by 1.5% to € 2395.40. The original payment was to be: - Beginning 2879
Juro, Fero, and Michael played bullets. In the beginning, everyone had the same number. In the first game, Juro won 4 bullets, and Fero 5 (that means Michael lost nine bullets). Michael won 7 balls in the second game, and Fero lost four. Michael lost thre - Students 2878
Until VII. B class girls and 15 boys. All the girls and 13 boys went on a trip. It was a total of 92% of the students in the class. How many girls go to VII? B? - Distance 2877
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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