Maths practice for 14 year olds - page 73 of 361

Number of problems found: 7215

Segment center coordinates
A (a1, 4) B(7, -2) segment AB has a center where both coordinates are equal
The ages 2
The ages of the two persons differ by 18 years. Twelve years ago, the elder one was 4 times as old as, the younger one. The present age of the elder one is:
Sheep white black
Forty sheep graze in the meadow. There are 4 times more whites than blacks. How many white and how many black sheep are grazing in the meadow?
Begonia seed sowing
The 94 m² flower bed is to be planted with begonias. An area of 2 dm² is needed for one seedling. How many grams of seeds should be sown if 1 g of seeds contains approximately 5000 seeds? Losses when growing seedlings are usually 30%.
Almond fat daily
The daily need for fat for a person is 80 g on average. Almonds contain 45% fat. How many grams of almonds would a person have to eat if he wanted to cover his daily need for fats by eating only almonds?
Cube volume decrease
By what percent does a cube's volume decrease if its edge length is reduced by a quarter?
Milk butter fat
Cow's milk contains an average of 3.6% fat. How many liters of milk are needed to make 250 g of butter? Butter contains 82% fat.
Square perimeter increase
By what percent does the area of a square increase if its perimeter increases by one-fifth?
Nitric lime nitrogen
Nitric lime contains an average of 19% nitrogen and 55% calcium oxide. How many grams of nitrogen per 1 m² if we bought a 25 kg package and thereby evenly fertilized a garden of 12 a?
Plot dimension reduction
The longer dimension of the rectangular plot was reduced by one-fifth, and the shorter dimension by 8%. By what percentage did the amount of land decrease? What is the perimeter of the fence now if the original dimensions of the fence were 60 m and 25 m?
Bread apple carbohydrate
Bread contains an average of 52% carbohydrates, and apples have 12% carbohydrates. How many apples weighing 220 g would you have to eat to get as much carbohydrate as 150 g of bread?
Contract payment distribution
The client paid the three partners CZK 90,000 for the completed contract. 40% of this amount was the material and 23% that the remaining amounts were paid for insurance and taxes. They divided the rest of the money in the ratio of 2:3:5. What amount did e
Pumpkin seed germination
The germination rate of Hokkaido pumpkin seeds is 92%. The weight of 10 seeds is 1.6 g. How many plants will sprout if we sow 20 g of seeds?
Proportional relationship 2
If y is proportional to x, and y=150 when x=2.4, what is the value of y when x=3.5
A toy 2
A toy car costing 500.00 is reduced by 10% in the sale. How much does it cost now?
Cutting in the ratio
Suppose a 75 m rope is cut in the ratio of 2/3. What is the measure of the longest cut?
The sum 26
The sum of Anna and Ina's ages is 19. In 4 years, Anna will be twice as old as Ina. What are their ages now?
Two numbers sum and product
Two numbers have a sum of 12 and a product of 27. What is the larger number?
Sum of 24
The sum of the two numbers is 95. If one exceeds the other by 15, find the numbers.
Two numbers 14
Two numbers are in the ratio 7:9. If the sum of the numbers is 112, then the larger number is:

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