Maths practice for 12-year-olds - page 290 of 347
Number of problems found: 6923
- Paint cans
The room has 4m, 5m, and 2.4m dimensions. How many cans of paint are needed to paint the walls and ceiling of this room? If one can, is it enough for ten m²? - Rectangular flowerbed
Around the rectangular flowerbed with dimensions of 5.25 m and 3.50 m, roses should be planted at the same distance from each other so that they are located in each corner of the flower bed and consumed as little as possible. How far do we plant them? How - Tiles path
A rectangular park measures 24 m X 18 m. A path 2.4 m wide is constructed all around it. Find the cost of paving the path with cement tiles of size 60 cm X 40 cm at the rate of $5.60 per tile. - Class 9A
On the final certificate, one-quarter of the class 9 A marked “C” in mathematics, the seventh mark “C” from the Czech language, and two students failed in chemistry. How many students attend class 9 A? - Pipe surface
Calculate the surface area of a pipe section if: outer diameter = 40 cm; length = 3 m - Water reservoir
The water reservoir is filled with one pump for four days by the second one for nine days. An outlet can drain the tank in 12 days. How long does it take to fill the reservoir if both pumps are running and not closed outlet channels? - Two numbers
The sum of the two numbers is 98. The first number is 4/3 times larger than the second. What are the numbers? - Barrel water
The water barrel weighs m kilograms. An empty barrel has a weight and kilograms. What is the weight of water in 15 barrels? - 15 number
What number is smaller (greater) by 15 than its half? - Bus intervals
At 9:00 a.m., three local buses met at the stop. The first bus has intervals of 20 minutes, the second every 25 minutes, and the third every 30 minutes. At what time will they meet again at this stop? - Birthday ages
Linda and her uncle Slavo have birthdays on the same day. A few years ago, Linda was 13, and her uncle was 45. How many years ago was it today that Uncle Slavo was three times older than Linda? - Two numbers
The sum of two numbers is 1. Identify these two numbers if you know that half of the first is equal to the third of the second number. - Roll the dice
What is the probability that if we roll the dice, a number less than five falls? - Pool percentage
Nine hundred hectoliters of water were filled into the cylinder-shaped pool. The pool is 1.5 m deep, and its diameter is 10 m. What percentage of the pool volume has the water-filled? - Square root calculation
Determine an unknown number equal to two-fifths of the square root of 49. - Raspberry baskets
Find how many raspberries are in the third and tenth baskets, if there are three raspberries in the first and eight raspberries more in each. - Consecutive numbers
The sum of four consecutive odd numbers is 240. What are the numbers? - Sticker collection
Peter is a 5th-grade student. He collects stickers. He has two-thirds of them in the album, a quarter is ready for exchange, and he wants to give eight stickers to his friends. How many stickers does Peter have? - Fuel consumption
The car consumed m liters of gasoline per s of kilometers. How many liters of gasoline does it consume per 100 km? - Suit price
The webshop reduced the price of the suit by p percent. What was the new cost of the suit?
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