Maths practice for 12-year-olds - page 42 of 361
Number of problems found: 7218
- Calculate 263
Calculate the area of a rhombus whose diagonals are u=12, v=19 - Bathroom 3
The bathroom measures 300x210 cm. What are the largest square tiles and how many will I need to cover the floor? - Reward - division
Mom promised the children a reward of 330 euros for their help. How should they divide the money if Juraj helped for 10 days, Ema for 8 days, and Hanka for 12 days? - All zeros
How many zeros does the product of the numbers 10.11.12.13.14.15.20.21.22.23.24.25 end with? - In an aquarium 3
In an aquarium 60cm long and 30cm wide, water is poured to a height of 25cm. Determine the mass of the water in the aquarium. - Saleswoman 3
The saleswoman cut 650 cm from a piece of a 30-meter and 60-cm long batten. How much fabric did she have left? - Oval running
Jan runs around the circumference of a circle with a diameter of 24 m. How many kilometers will he run if he goes around the circle four times?
- RR trapezoid 12
In an isosceles trapezoid ABCD, calculate the missing lengths of the sides when a=46cm, b=85cm height=84cm. - Chocolate 10
Anička bought three identical chocolates. Tonda bought 5 identical chocolates. Tonda paid 8 euros more than Anička. How much did one chocolate cost? - Segments 6
Compare the ratio of 1cm and 1m. - Competitor 2
In the race, 1 twelfth of the competitors finished ahead of me and 7 eighths of the competitors finished behind me. How many of us ran? - Ice rink
A rectangular rink measuring 15m and 20m long needs to be covered with a layer of ice 4.5cm high. How many liters of water are needed to create ice? - A quarter of the trees
There were 48 apple, pear, and plum trees growing in the garden. A third of the trees were apple trees and a quarter were pear trees. How many plum trees were there in the garden? - Reduced - rectangles
The dimensions of the rectangle are a = 42 cm, and b = 91cm. Determine the perimeter and area of the rectangle, which is reduced in size compared to the original rectangle in the ratio 6:7. - Segment - ratio
Calculate the size of the new segment that is created by changing the segment CD = 12 cm in the ratio 4 : 3.
- Price increase
As part of a packaging innovation, the price of mineral water, which previously cost €0.68, was changed in the ratio of 11:8. How much will we pay for a bottle of mineral water now? - New Year's price increase
After the New Year, the prices of goods changed in a ratio of 3 : 2. How much will we now pay for a dining set (6 chairs and a table), if the chair originally cost €44 and the table €232? - Salaries - inflation
Dad's salary was increased by 5:4. His original salary was 880€. What is his salary now? - Princess 2
The fat princess weighed 168kg on October 5. By November 10, her weight had changed in the ratio of 7:4. How much did she weigh on November 10? Did she gain or lose weight? - Padded 2
How many square meters are needed to make 40 pieces of wooden padded equilateral triangles with sides of 30 cm and heights of 26 cm?
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