Maths practice for 12-year-olds - page 289 of 348
Number of problems found: 6960
- Dimensions 3408
The room has 4m, 5m, and 2.4m dimensions. Suppose one can is enough to paint 10 m². How many cans of paint are needed to paint the walls and ceiling of this room? - Sputnik
The first Earth satellite was flying at a speed of 8000 m/s. At that rate, he circled the Earth in 82 minutes. Jet flies at an average speed of 800 km/h. How long would it take to circle the Earth around? - Timetable 3401
The train ran the distance between stations at a speed of 90km/h for 4 hours. What speed can he drive if, according to the new timetable, the journey takes an hour longer? - Cooking 3400
Cooking one egg takes 4 minutes. How many minutes does it take to cook four eggs? - Calculate 3398
How to calculate 2/5 m = x dm? - Two-thirds 3388
The kneaded cake dough has a volume of 1.8 l. When baking, it increases its volume by about two-thirds. Can a baked wheel fit on a baking sheet measuring 36x30x8cm? How tall will the cake be after baking? - Consumption 3385
A liter of gasoline costs 1.516 euros. The average consumption of the KOLO car is 6.9 l per hundred kilometers. The car has a 40-liter tank. How much will the car owner pay for the trip from Zilina to Prague and back if he follows the 413km long route? - Larger number
Which number a is 15 smaller (solve also for a is larger) than its half? - Quarter-liter 3380
A container has the shape of a regular hexagonal prism with a base and a capacity of 0.5 dm2, which means three quarter-liter cups of water fill the brim. What is the height of a container? - Calculate hypotenuse
Calculate the hypotenuse of a right triangle PT if the length of one hypotenuse is 1.2 dm and the length of the hypotenuse is 1.3 dm. - Determine 3372
The son and mother are 32 years old together. My mother is 28 years older. Find how old they are. - Audience 3369
In the hockey audience between Sweden and Finland, there are 126 men, 65 boys, 46 children from Sweden, 50 children from Finland, and 200 Swedes, of which half are men and 39 women from Finland. How many people are in the audience? - Cylindrical tank
The cylindrical tank holds 600hl water and is deep 2.5 m. Calculate the diameter of the cylinder. - Recycled 3365
A recycled paper made from 1.5 tons of old paper is equal to that made from 10 trees. How much paper do pupils collect to save 100 trees from falling? - Equation 3364
Create a number snake from the equation and solve: 2x - 5 = 7 4x + 1/3 = 7 3 (x-2) +4 = 7 - Expenditures 3355
Expenditures on joint trips for pupils were: Travel expenses in euros. Meals in euros. Three nights in euros. Small expenses in euros. Calculate the amount of c that each student paid. - Tree shadow 3
What is the diameter of a tree wrapped in a rope around 3m 9dm 7cm long? How big is its cross-sectional area? - Crowns 3352
A box with six pieces of soap costs x crowns. How much will five pieces of soap cost? - Kilometers 3351
The speedway goes at an average speed of kilometers per hour. Which track will it cross in 12 minutes? - Potatoes 3346
2/5 q of potatoes were sold in the first hour, 5/6 q in the second hour, and 40 kg in the third hour. How many kilograms of potatoes were in total?
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