Themes, topics - practice for 11 year olds - page 19 of 20
Number of problems found: 387
- Clock Tower
What angle is between hands-on Clock Tower when it shows 17 hours and 35 minutes? - Weight of air
What is the weight of air in the living room measuring width 8 m, length 5 m, and height 3.1 m? Air density is ρ = 1.2959 kg/m³. - Cuprum
From the 1600 mm long sheet of copper plate 2 mm thickness, we have separated over the whole length of the belt weighing 6000 g. Calculate belt width if one dm³ copper weighs 8.9 kg. - Tablecloth
I embroider a tablecloth in 20 days, but if I embroider for 3/4 hours a day, I have embroidered it for 15 days. How long do I embroider a day?
- Sisters
Sisters Hanka and Vera go mostly to their grandmother by bicycle. Journey took Hanka 30 minutes and Vera 20 minutes. How long will Vera catch up with Hanka when she starts from home five minutes later than Hanka? - Draw it!
Draw two lines c, d that c || d. On line c, mark points A and B. By point A, a lead perpendicular line to c. By point B, lead perpendicular line to c. - Crown
Siblings collect 2-crowns and 5-crowns. Together have 80 coins with a total of value 310 crowns. How many saved two crowns, and how many five crowns? - Plan of the village
The plan of the municipality in 1:1000 scale has plotted garden with dimensions 25 mm and 28 mm. Determine the area of gardens in ares in reality. - Hřiště
The map scale is 1: 5000. The playground is rectangular and, on the map, has dimensions 4 cm and 2 cm. What is the area of the playground in square meters in reality?
- Map 2
At what scale is a map made if the distance 8.2 km corresponds to the map segment 5 cm long? - Hiker
Hiker went half of the trip the first day, a third of the trip the second day, and remains 15 km. How long was the trip he planned? - Garden
Father dug up the garden in 11 few hours. Son in 15 hours. How many hours does it take to dig up the garden together? - Dog II
The journey from a rangers' home to the town is 6 km. Mr. ranger started from his home and went 3 km per hour. His women came from the town and also went 3 km per hour. With ranger starts the dog and runs in 12 km in 1 hour. The dog went to the ranger's w - Car range
Calculate the maximum range of cars, if you can spend 10 euros, the diesel price is 1.55 Eur/l, and car consumption is 3 l/100 km.
- Forestry workers
56 laborers have employed planted trees in the forest. For 8 hour work, a day would end job in 37 days. After 16 days, 9 laborers go forth? How many days are needed to complete planting trees in nurseries by others if they work 10 hours a day? - Bus vs. train
The bus started from point A 10 minutes before the train started from the same place. The bus went at an average speed of 49 km/h, train at 77 km/h. To point B train and bus arrived simultaneously. Calculate the train journey time if the train and bus tra - Aircraft
If an airplane flies 846 km/h for 8 h, how far does it travel? - Chase
Paul travel at 60 km/h. After the 18 km ride found that he had forgotten an important book, his brother Thomas was behind him carrying it. How fast must Thomas go to catch up with Paul in 31 minute? - Motion problem
From Levíc to Košíc, go car at speed 81 km/h. From Košíc to Levíc, go another car at speed 69 km/h. How many minutes before the meeting will be cars 27 km away?
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