Math practice for 13 year olds - page 262 of 424
Number of problems found: 8476
- Father 7222
Now a father is five times as old as a son. In 2 years, the father will be four times as old as the son. How old is Dad, and how many is Son now? - Calculate 7221
Calculate exactly when the hour and minute hands on the clock intersect. - Donuts
Find how many donuts each student will receive if you share 126 donuts in a ratio of 1:5:8 - On a truck
Two types of barrels were loaded on a truck, a larger one weighing 50 kg and a smaller one weighing 20 kg. A total of 120 barrels were loaded on the truck and their combined weight was 3300 kg. Calculate how many larger barrels were loaded on the truck in - Rectangular 7215
The rectangular rink with dimensions of 50 m and 25 m should be covered with a layer of ice 4 cm high. How many liters of water are needed to make ice if the ice volume is 10% greater than the volume of water? - The garden
The garden has the shape of a rectangular trapezium. The bases have lengths of 27 meters and 36 meters, and the trapezoid's height is 12 meters. Calculate how much a fence will cost this garden if one meter costs 1.5 €. - Gold horseshoe
Calculate the volume of a gold horseshoe that weighs 750g. - Multiplied 7208
Which fraction number must be multiplied by 40 to get a 6% smaller number? - Percentage 7207
There are 1.5 times more women in the cinema than men. What percentage of women are in the cinema? - Motorcyclist
From Trutnov, the motorcyclist started at an average speed of 60km/hour. At 12.30hrs, Peter began driving the passenger car at 80km/hour. How many hours and at what distance will a car catch a motorcycle from Trutnov? - Younger 7202 If Nina were nine times older and her mother was nine times younger, they would be 85 years old. So, Ninka is 85, and Mom is 85.
- Procedure 7191
I have a board measuring 3.2 m x 1.23 m, and I need to draw it in A3 format. It is 42 cm x 29.7 cm. How do I find out the ratio for drawing the board? I will also ask for the procedure. - Game 27
Susan wanted to play the game. In the beginning, the first says a number from 1 to 8. Then the second player adds a number from 1 to 5 and tells the sum. Again, Susan adds a number from 1-5 and says sum, etc. The winner must say the number 27. What first - Hectares
The tractor plows on the first day of 4.5 ha, the second day of 6.3 ha, and the third day of 5.4 ha. It worked whole hours a day, and its hourly performance did not change and was the highest possible. How many hectares did it plow in one hour (what is it - Minutes 7177
The tank holds 140 liters of water. It is filled with a tap in 5 minutes, and the drain is emptied in 7 minutes. How long will it take for the empty tank to fill if we open the faucet and drain it? - Cube surface and volume
Find the surface of the cube with a volume of 27 dm³. - Soup from canteen
For how many people is 90 liters of soup enough if we assume 3/8 liters of soup per person in the canteen? - Inlet and outlet
The pool has a capacity of 50 hl. The inlet pipe flows in 1 minute 1.25 hl, and the waste pipe outlet drains the full pool in 50 minutes. How long will it take to empty the entire pool when both the inlet and outlet are opened simultaneously? - Butter
The same amount of butter is cut evenly from a cuboid every day. In seven days we used so much butter that all its dimensions were halved. a) How much percent of butter do we still have left? b) How many days will the butter last if we continue to cut the - Kilometers 7161
Peter cycled 24 kilometers on the weekend, twice as many on Saturday and Sunday. Thus, he cycled 24 kilometers more on Saturday than on Sunday.
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