Maths practice for 12-year-olds - page 284 of 347
Number of problems found: 6923
- Skate savings
Luke was saving for new roller skates. The first month he saved a third of their price, the second month a quarter, the third month half of the rest of the price, and the fourth month €25. How much € did the skates cost? - Bridge building
Ninety-six soldiers will build a pontoon bridge in 5 hours. How long before the same bridge creates 54 soldiers? - Popsicle money
Karel could buy 25 popsicles for 0.69 euros for the money saved. How many comics could you buy with this money if one costs 2.62 euros? - Equation verification
Calculate and verify the correctness of the test result: 12 (3c - 5) + 11 = 10 (8c - 7) - 16c - Rectangle from string
String 12 m. Make a rectangle when one side is two times longer than its width. - Cube walls
The wall of the cube has an area of 8 cm square. How many square cm is the surface of the cube? - Paint cans
The room has 4 m, 5 m, and 2.4 m 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? - Train speed
The train ran the distance between stations at a speed of 90 km/h for 4 hours. What speed can he drive if, according to the new timetable, the journey takes an hour longer? - Egg cooking
Cooking one egg takes 4 minutes. How many minutes does it take to cook four eggs? - Unit conversion
How to calculate 2/5 m = x dm? - Trip cost
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? - Hexagonal prism height
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. - Mother and son age
The son and mother are 32 years old together. My mother is 28 years older. Find how old they are. - Cylindrical tank
The cylindrical tank holds 600hl water and is deep 2.5 m. Calculate the diameter of the cylinder. - Paper recycling
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 solving
Create a number snake from the equation and solve: 2x - 5 = 7 4x + 1/3 = 7 3 (x-2) +4 = 7 - Trip expenses
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.
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