Maths practice for 11-year-olds. - page 199 of 220
Number of problems found: 4398
- Ratios
Divide: a) 250 CZK in the ratio of 2:3 b) 1000 CZK in the ratio 4:7:9 - Oceans
The Earth's surface is approximately 510,000,000 km² and is 7/10 covered by oceans. Of which 1/2 covers the Pacific Ocean, the Atlantic Ocean 1/4, the Indian Ocean 1/5, and the Arctic Ocean 1/20. What parts of the Earth's surface cover each ocean? - Aquarium
The aquarium is a cube with an edge of 45 cm. How much water can fit in there? - Flood water
Flood waters in some US villages meant the homes had to be evacuated 362 people. Fifty of them stayed at elementary schools, 62 they slept with their friends, and others went to relatives. How many people have gone to relatives? - Diameter
The diameter of a circular plot is 14 dm. Find the circumference and area. - Tank
How many minutes does it take to fill the tank with 25 cubic meters of water filled at 150 hl per hour? - Children
Margaret and Zdena weigh the same, and Petra weighs 3 kg more. Together, they weigh 156 kg. How much do they weigh? - Compare
What's more? Fill in the signs of equality or inequality: 12 000mg ... 0,12kg 12t ... 0,12kg 14kg ... 0,014t 423mg ... 0,423kg 12,3g ... 0,001 23kg 89g ... 89 000kg - Pupils
Two classes want to collect money. Boys are four-seventh pupils. In time, a quarter of the boys and a sixth of the girls did not pay, which meant 12 sinners. How many pupils attend these two classes? - Ships
The red ship begins its circuit every 30 minutes. The blue boat begins its circuit every 45 minutes. Both ships begin their sightseeing circuit in the same place at the same time, always at 10:00 o'clock. a/What time does the boat meet again? b/How many t - The port
Four ships Berthed in the port. Together, sail from a port. The first ship will return to port every two weeks, the second after four weeks, the third after eight weeks, and the fourth after 12 weeks. After how many weeks do all the boats meet at the port - Minutes
Determine the difference in minutes: T1 = 2 3/20 h T2 = 2.3 h - Cube 5
The surface of the cube is 15.36 dm². How will this cube's surface area change if the edges' length is reduced by 2 cm? - Field on plan
The plan has a scale of 1:2500. Determine dimensions in centimeters of the plan if the field has a length of 310 meters and 182.5 meters. - Infants water
The tank, which has ten hectoliters of water for infants, went 580 liters in the morning and 340 liters in the afternoon. How many liters are left in the tank? - Paper squares
We should cut the paper rectangle measuring 69 cm and 46 cm into as many squares as possible. Calculate the lengths of squares and their number. - Motor oil
Thirty liters of oil cost 28.80 Euros. How much cost a liter? - Pump
The yard pump is dripping water. Every drop is 1 ml. How many drops will be necessary before filling a bucket with a volume of 10 l? Calculate how long it will take to fill the bucket when drops fall each second. - Tram stop
At the tram stop, trams No. 4 and No. 5 met at 10 AM. Tram no. 4 runs every 5 minutes, tram No. 5 at an interval of 7 minutes. How many times will we meet until 12 o'clock? - Steps
Peter's steps are 70 cm long, and John's are 45 cm long. After how many meters do their footsteps meet?
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