Maths practice for 14 year olds - page 225 of 380
Number of problems found: 7592
- Number summand division
Divide the number 135 into two summands so that one summand is 30 greater than two-fifths of the other summand. - Orchard tree storm
There were 46 more apple trees than pear trees in the orchard. The storm destroyed one-quarter of apple trees and seven pear trees. There are 80 trees left. How many are left? - Rectangle JANO
The rectangle has side lengths | JA | = 16 cm and | AN | = 12 cm. Point S is the center of the JO side, and point T is the center of the JA side. Calculate the perimeter of the pentagon in cm. - Tractors
Wheel and belt tractors each day plow 8 ha of fields. The wheel tractors would have to work to plow 76 hectares for 12 days. Eight days with the belt tractor together. How many hectares do each day of each tractor? - Water current speed.
Two cities along the river are 100 km apart. The powerboat downstream runs for 4 hours, upstream for 10 hours. Determines the river's current speed. - Chocolate
I have a box of chocolate - white, milk, and dark. The ratio of white to milk with dark is 3:4. The ratio of white and milk to dark is 17:4. Calculate the ratio between white, milk, and dark chocolate. - Ages 2
A man's age is four times his son's age. After five years, he will be just twice his son's age. Find their ages. - The tub
If we drop the 5 l from the first tap and the second 2 liters of water, the water in the tub will have a temperature of 25°C. If we drop 3 l from the first tap and from the second 4 l of water, the water in the tub will have a temperature of 21°C. Determi - Isosceles trapezoid
A father decided to replace the tabletop, which is shaped like an isosceles trapezoid, with parallel sides of 120 cm and 60 cm, and a shoulder that is 50 centimeters long. How much does it pay for a new plate and a square meter worth 17 euros? - Earth moon distance
The Earth's distance from the moon is 3,844.10 to the eighth meter. How many kilometers is it? - Spruce height
How tall was the spruce that was cut at an altitude of 8 m above the ground, and the top landed at a distance of 15 m from the heel of the tree? - Discount sale
At Christmas Sale, after a 20% discount, the cosmetic package was priced at 5 euros and 60 cents; later, it went to 3 euros and 80 cents. How much percentage is the total discount? - Unknown Number Increase Percent
If you increase the unknown number by 14 percent, you get the number 136.8. Find an unknown number. - Cutting square
We cut the circle with the highest possible diameter from a square with a side of 30 cm. How many percent of the square area is this circle? - Hectoliters
How deep is the pool if there are 2025 hectoliters of water, the bottom dimensions are a = 15 meters b = 7.5 meters, and the water level is up to 9/10 (nine-tenths) of the height? - Marble game distribution
Paul, Isaac, and Kurt played bullets. They had a total of 25 marbles. Palo had 6 more bullets than Kurt at the start. Then Isaac won 8 bullets from Paul, and thus Isaac had the same number of bullets as Kurt. How many marbles does Pal have left? - Three pumps
We are filling the pool. The pool would fill the first pump in 12 hours and the second in 15 hours. If all three pumps ran simultaneously, they would fill the pool for 4 hours. How long would the pool fill only with the third pump? - Four poplars
Four poplars are growing along the way. The distances between them are 35 m, 14 m, and 91 m. At least how many poplars need to be dropped to create the same spacing between the trees? How many meters will it be? - Two cities
The distance between cities A and B is 132 km. At 9.00 AM, the cyclist started the bike at an average speed of 24 km/h, and at 10.00 AM, the B cyclist at an average speed of 30 km/h. How long and far from A will they both meet? - The pool
The pool contains 220 m³ of water. Workers can empty the pool either: a) 10 hours of pipe B and 8 hours of pipe A, or b) 10 hours of pipe A and 7 hours of pipe B. How many cubic meters of water will flow in 1 hour from pipe A, and how many from pipe B?
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