Maths practice for 11-year-olds. - page 18 of 213
Number of problems found: 4252
- Density of a cube
Calculate the density of a cube if its edge is 8 cm and its mass is 3 kg. - Round up - fountain
A fountain, cylindrical in shape with a base diameter of 2 m, is 25 cm deep. How many litres of water can it hold? Round the result to the nearest whole number. - Iron rod
What is the mass of a cylindrical iron rod with a length of a = 9 m and a diameter of d = 6 cm? The density of iron is 7,800 kg/m³. Express the result in kilograms and round to the nearest whole number. - On a bicycle 5
Clara left the town square on her bicycle and rode toward the city at an average speed of 20 km/h. Johnny left the same square on his bicycle 15 minutes after Clara and rode in the same direction at an average speed of 30 km/h. How long did it take Johnny - A quarter of a gram
How much is three quarters of 200 grams? - Cyclist 30 A cyclist covered a distance of 18 km in 32 minutes at a constant speed. What distance in kilometres would he have covered at the same speed in 80 minutes?
- Books 4
A student read 30 pages in 6 days. He read 75 pages in x days. Calculate x. - Express the unknown
Using the formula p = F ÷ S, express the unknown F. - Teeth
An adult has a total of 32 permanent teeth. How many of them are molars if 1/4 of the teeth are incisors, another quarter are molars, and the remaining quarter are canines? - Fuel and oil ratio 2T
4 litres of gasoline are to be mixed with oil in a ratio of 33:1. How much oil is needed? - Evaluate expression
Evaluate the following expression: −1 2/7 + (−2 1/4) + 1/2 = - Average 110
The average of five numbers is 1.3. What is their sum? What is the arithmetic mean of the numbers 0.04, 0.014, and 0.21? The arithmetic mean of four decimal numbers is 2.5. Three of these numbers are 1.8, 0.65, and 3.1. What is the fourth number? - Buses 7
Two bus lines leave the bus stop according to the following schedule: A) at 8:00, every 6 minutes until 23:00 B) at 8:00, every 14 minutes until 23:00 How many times will buses of both lines leave the bus stop simultaneously between 8:01 and 20:00? - Unknown fraction
2/6 + [missing fraction] = 1. What is the missing fraction? - Cinema visitors
There are 35 seats in each row of an open-air cinema. Determine the maximum number of visitors that can fit in the viewing area, given that the total number of seats is more than 705 and fewer than 740. - Concert organizers
800 people came to the concert, which was a quarter more than the organisers had expected. How many people did the organisers expect? - Children - dividing
What is the minimum number of nuts needed to be able to divide them equally among 10, 12, and 18 children? - Coal Used and Remaining
We used one quarter of the coal we bought, leaving us with 12 q. How much coal did we buy? - Animals - pasture
There are 195 animals in total on the pasture: sheep, goats, and calves. There are half as many sheep as goats and twice as many calves as goats. How many sheep are there on the pasture? - Cutting a cuboid
A cuboid can be cut into 200 cubes, each with a volume of 8 dm³. Calculate how many cubes with a volume of 1 cm³ this cuboid can be cut into without a remainder.
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