Maths practice for 14 year olds - page 251 of 382
Number of problems found: 7625
- Divide
Divide the area of rectangles with dimensions of 32 m and 10 m by the ratio of 7:9. What area corresponds to a smaller section? - Body diagonal - cube
Calculate the surface and cube volume with a body diagonal 15 cm long. - Oil Storage Cans Liters
We have to store seven cans of oil of 25 liters each in 45 cans, some of which are five liters and some three liters. How many three-liter cans and how many five-liter cans do we have? - Three-fifths
Three-fifths of the school's students are girls. What percentage are boys? - TV Diagonal Length
Calculate the diagonal length of the 87 cm and 60 cm TVs and round the result to units. - Production Percentage Increase
The new line-producing screws did not work at total capacity from the beginning. On Monday, she produced 20% of the daily norm. On Tuesday, she already met 4/5 of the daily norm. By what percentage was the number of screws made on Tuesday higher than on M - Number percentage increase
The number x = 2 / p² is given. Calculate a number 400% greater than x if p = 10. - A bridge
The bridge over the river has the shape of an arc. The bridge is 10 feet above the water at the center of the river. At 27 feet from the river's edge, the bridge is 9 feet above the water. How wide is the river? - Train speed
The troop fired two guns from the same place at 10 minutes and 30 seconds intervals, but a person on a train approaching the place heard a second shot 10 minutes after the first. The speed of the train (in km/hr), supposing that sound travels at 340 m/s, - Cube Edge from Volume
Find the length of the cube's edge and its volume is equal to 60% of the volume of a block measuring 7 cm, 8 cm, and 6 cm. - Savings distribution
Petr had 20% more savings than Jana, who saved half of what Markéta did. Together they saved CZK 2,520. How much CZK did each of them save? - Probability of First Pie
Grandma used to cook sheep and cottage cheese pies together. There were 30 made from sheep cheese and 5 fewer made from cottage cheese. George took the first one and got 6 brownies and 3 curds. What is the probability that my first pie will not be bronze? - Isosceles Trapezoid Height
In the isosceles trapezoid ABCD, the base length is a = 10 cm, c = 6 cm, and the arm's length is 4 cm. Calculate its height—the result round to tenths. - TV Price After Discount The plasma TV happened at Christmas. Case 738eur. After Christmas. The shop sold it out on holidays, and its price decreased by 12%. How much did the TV cost after the discount?
- Two melons
There are two melons in the box. Together they weigh 11 kg. The weight of green is 3 kilograms lower than three times the weight of yellow. What is the weight of a green melon? - Ladder Length Wall Distance
The ladder is 1.4 m from the wall and touches 3 m high. How long is the ladder? - Wood harvesting
The harvested wood is bundled from the forest to a sawmill. The driver makes the journey four times a day, and the work takes him eight days. How often would he have to go daily to finish the job two days earlier? - Rain
It rains at night. On 1 m² of the lake will drop 60 liters of water. How many cm will the lake level rise? - Horizontal watertank
We have a horizontal tank shaped like a rainwater cylinder, 3.45 m long and 1.7 m wide. Calculate how many liters of water is in first centimeters. - A residential
A residential colony has a population of 5400, and 60 liters of water is required per person per day. The effective utilization of rainwater constructed a water reservoir measuring 48m × 27m × 25m to collect the rainwater. For how many days is the water i
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