Maths practice for 12-year-olds - page 287 of 351
Number of problems found: 7017
- Sugar
From 3 tons of sugar, beet produced 480 kg of sugar. How many tons of sugar was produced from 17.5 tons of sugar beet? - Diver and pressure
Determine the pressures exposed to a diver without a suit at a depth of 15 meters, with a small space suit at a depth of 25 meters, and a massive suit at 70 meters in water. - Contract
Eight employees complete the contract for 65 hours. After 17 hours, three employees had to leave for another job. How many more hours will the job on the contract be fulfilled? - Calculation 3620
The mine foreman calculated that 2 pumps must be in operation for 17.5 hours to drain the tunnel. He wanted to speed up the emptying of the shaft and added 3 more identical pumps. How long will it take to empty the shaft? Please also show your calculation - Weight 3618
Fifty pins with the same weight weigh 4.6 grams. How much do 15 pins weigh? - Rhumbline
Find the circumference and area of the rhumbline ABCD if the short side AD has a length of 5 cm, and the heel of the height from D leading to the AB side divides the AB side into two sections of 3 cm and 4 cm. - Distance 3615
Honza left home at 8 a.m. on foot at an average speed of 4 km/h. At 11 a.m., dad followed him on a bicycle at an average speed of 40 km/h. How long and at what distance from home will dad catch up with Honza? - Master work
The master will complete the given task in 4 hours. When they're done together, how long will it take to master students entirely in three hours? - Canister
Gasoline is stored in a cuboid canister having dimensions 44.5 cm, 30 cm, and 16 cm. What is the total weight of a full canister when one cubic meter of gasoline weighs 710 kg, and the weight of an empty canister is 1.5 kg? - Surface and volume od cuboid
The square base of the cuboid has an area of Sp = 36 cm2, and its height is 80 mm. Determine its surface area and volume. - One-thirds 3606
They baked one-third of the flour on the first day in the bakery and used 75% of the rest the next day. On the third day, 120 kg of flour remained. How much flour did they have in the beginning? - Square glass
What is the square window glass area with the side 4 dm? Do you know how many cm² is? - Gingerbreads 3599
Janko and Marienka ate 36 gingerbreads together. Janko ate 14 more gingerbread. How many gingerbreads did Marienka eat? How much did Janko eat? - Playing match
Romania played a match against Canada. Canada won the duel by six goals. They scored a total of ten goals in the game. Find the number of goals scored by Romania. - Released 3593
The Harry Potter book was released in the second quarter, and 6,000 copies were sold in this quarter. In the third quarter, it sold 8% more and in the fourth quarter it sold 15% more than in the third quarter. How many Harry Potter books have been sold by - What 3592
What is 15% of 30% of 600? - 1/10 of meter
How many centimeters is one-tenth of 1 meter? - Circumference 3589
Calculate the circle's radius if the circumference and area are in a 2:5 ratio. - Switzerland - summerjob
Zuzka and Hanka used to work in a cherry orchard to earn money for a sightseeing trip to Switzerland. They brushed 15 trees every day and harvested the entire orchard in 10 days. How long would it take them to harvest the entire orchard if they brushed 20 - Discount 3583
The TV cost € 420 after a 9% discount. How much did he cost before the discount?
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