Maths practice for 12-year-olds - page 270 of 362
Number of problems found: 7228
- Rainfall
On Thursday, 1 cm of rainfall fell. How many liters of water fell into a rectangular garden with 22 m x 35 m dimensions? - Approximately 4662
Peter bought an LPG car. A liter of LPG-liquefied petroleum gas costs EUR 0.50/liter, and the price of gasoline is EUR 1.30/liter. Peter's used car cost 2950 Euros. How many kilometers does he have to drive to fully recover the car's value by going cheapl - Express 4659
Express the ratio in the basic form. a) 1cm: 1m b) 3 ha: 30 a c) 50 kg: 1 t d) 2.5 m: 10 cm - Cleaning windows
The cleaning company has to wash all the school windows. On the first day, one-sixth of the windows are washed. The next day, three more windows are washed than the first day, and the remaining 18 windows are washed on the third day. Calculate how many wi - Smaller 4657
Two supply pipes open into the pool, and the smaller pipe fills the pool in 40 hours. The empty pool will be filled in 16 hours if we open both supply pipes. How long would it take to fill if only the second, larger inlet pipe was opened? - Candies
There are red, blue and green candies in bad. Red to green is in the 6:11 ratio, and blue to red is in the 7:5 ratio. In what proportion are blue to green candies? - Five-crowns 4655
Martin has metal coins saved up in the cash box. Crowns, two-crowns, and five-crowns. The ratio of crowns to five-crowns is 7:4, and five-crowns to two-crowns is 2:9. What is the ratio of crowns and double crowns?
- Grand Pardubice Steeplechase
Jirka decided to divide the winnings from the bet in Grand Pardubice Steeplechase (Velká Pardubická) between himself and his three younger brothers according to age in the ratio of 2:3:5:7. They paid each amount in whole crowns. One of the amounts was CZK - Parallelogram
Calculate the unknown side of a parallelogram if you know the perimeter o and one side: a) o = 7.2 cm; b = 1.8 cm b) o = 5.4 cm; a = 1.9 cm - Determine 4649
Determine five solutions to the equation of two unknowns. Write as arranged pairs and draw in the graph. What does a diagram of a linear equation look like? 2x + 3y = 7 - School
The headteacher considers the distribution of pupils in a race in groups of 4, 5, 6, 9, or 10. How many pupils must have at least one school option? - Nuts
500g of hazelnuts cost 150kč, 2kg of walnuts cost 280kč and 20dag of peanuts cost 32kč 1. how much do we pay for 150g of peanuts 2. how many grams of walnuts cost 42kč 3. how much do we pay for 150g of a mixture that the seller mixes for us in equal parts - Including 4639
Visitors to the castle can choose from three tour circuits that last 35, 50, and 70 minutes, including a short break for the guide. At 8 o'clock, the guides will go out with their groups on the route. How long would it take to meet again if everyone follo - Balls groups
Karel pulled the balls out of his pocket and divided them into groups. He could divide them in four, six, or seven, and no ball ever left. How little could be a ball? - Time clock
What are the angles of the hour hand and the minute hand if it is 0:40?
- Seamstresses 4635
Eight seamstresses have to complete the order in 16 days. After four days, the two seamstresses switched to another job. In how many days will the order be fulfilled? - Cost reduction
Two MP3 players whose prices were equal initially were discounted, the first by 20%, the second by 35%. After the price reduction, their prices were 750 CZK different. What was each player's original price? - Two rooms
If a woman cleans the room in 30 minutes and a man in 90 minutes, how long will it take them to clean two rooms? - Dividing
Divide the three-line segments 13 cm, 26 cm, and 19.5 cm long for parts so that the individual pieces are equally long and longest. How long will the individual parts take, and how many will there be? - Seagull
An artificially created island in the shape of a circle with a radius of 50 m is overgrown with grass. The only exception is a landing area for helicopters in the shape of a rectangle measuring 15 m and 8 m. What is the probability that the flying seagull
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