Maths practice for 11-year-olds. - page 194 of 222
Number of problems found: 4421
- Speed of sound
The average speed of sound is 330 metres per second. Estimate how long it will take to hear a church bell 1 km away. Calculate the distance from which you would hear the sound after 10 seconds. - Cinema 5
James goes to the cinema every Tuesday for five years. After a year, he learns that a ticket on Wednesday costs only €5.10, while on other days it costs €5.60. He decides to switch to going every Wednesday instead. How much money will he save in total? - Gasoline consumption Skoda MB
The consumption of cars for 100 km is 6.6 liters of gasoline and 1 liter of gasoline costs € 1.274. How many euros did grandfather spend when the car traveled 321 km? - Gears
The gearing fits the wheel with 20 teeth to the wheel with 36 teeth. Before the machine is started, personnel mark the teeth of the smaller wheel and the opposite of the larger wheel. How many times after starting the machine wheels turning that painted t - Division of money
Calculate how many euros Matthew, Miriam, Lucy, Michael, and Jane, when together, have 2,700 euros, and the amounts are at a ratio of 1:5:6:7:8. - Floor
The rectangular floor of the living room has a length of 5.4 meters and a circumference of 17.2 meters. What is its width? - Cows
Twenty cows have food for 60 days. We reduce the dose to two-thirds for 18 cows. How many days will it feed? - Number
I think the number. If I add to its third seven, I get the same as when to its quarter add 8. What is the number? - Two cars 2
Two cars started from two positions 87 km distant at the same time in opposite directions at speeds of 81 km/h and 75 km/h. What was the distance between them after 2 hours and 50 minutes of driving? - Car - road
The car started at 11:40, traveling 54 km/h between A and B, and arrived at 12:20. Find the distance between A and B. - Bricks II
3/4 bricks weigh 6 kg and 2/3 bricks. How weighs one whole brick? - Candy cost
Two bars and one candy cost 24 CZK. Two candies and one bar cost CZK 27. How much does candy cost? - Cinema attendance
There were shows in the city cinema over the weekend. On Saturday, 12 students from our class participated in the performance, and on Sunday, 8 students participated. Fifteen pupils attended the performances. How many pupils attended both performances? - Bean game
Viktor lost 45 beans at the party. In the second game, he won 36 beans. How did Viktor turn out overall? - Boat weight
The 3.2 m high container weighs 4.2 tons. The 30 m long ships weigh as much as 30 containers. What weight does the boat have? - Heart as pump
The heart pumps out 5.17 liters of blood in 1 minute. How many liters of blood are pumped per hour, and how much per day? - The father
The father is 36 years old, and the son is six years old. Thus, a father will be three times older than a son by how many years? - Chain repairs
The metal chain has a length of 92 m. With each repair, 4 m will be lost. What is the most significant number of repairs they will do if the chain is not shorter than 56 m? - Calculate hexagon
Calculate the area of a regular hexagon with side a = 2 cm. - Unknown number 24
I think the number: a) It is equal to the area of a square with a perimeter of 12. What is this number? b) Its half is seven times bigger than its quarter. What is this number?
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