Maths practice for 12-year-olds - page 327 of 347
Number of problems found: 6932
- Pedestrian up-down hill
The pedestrian goes for a walk first on the plane at 4 km/h, then uphill at 3 km/h. Then it is in the middle of the route, turns back, and goes downhill at 6 km/h. The total walk was 6 hours. How many kilometers went pedestrians? - Aircraft
The aircraft has a fuel tank 74 hl of aviation fuel, and flight consumes 3.2 liters of fuel. Identify the function that expresses the dependence of the fuel volume in the tank on the track distance plane flew by. How many hectoliters of fuel is still in t - Strawberries
The father collects strawberries himself in 2 hours and the son in 9 hours. How long will it take them to join him when he comes to help his son collect strawberries after 3 hours? - Tank
The tank bottom has dimensions of 1.5 m and 4 1/2 m. The tank is 379 hl of water. How high is the water surface? - Pool 2
The first supply is by the pool fill for five hours and the second fill for six hours. The drain should be drained for 15 hours. How many hours is the pool full when we open both inlets now, and the outlet opens two hours later? - Playground
Fencing square playground cost € 716; 1-meter cost € 13. What is the area of the playground? - Racing track
On the racing track, circling three cars. The first passes one circuit for 19 seconds, the second for 12 seconds, and a third for 9 seconds. a) Calculate the number of seconds since starting to catch all three cars together for the first time again across - 7th grade pupils
Students researched which winter sport is most popular among their classmates. They found that 2/5 would most like to play hockey, 2/9 prefer skating, 3/10 prefer skiing, and 1/15 do not like any winter sport. What proportion of pupils prefer a sport othe - Cupcakes
In a bowl were some cupcakes. Jane ate one-third, and Dana ate one-quarter of the cupcakes. a) How many cookies ate together? b) How many cookies remain in a bowl? Write the results as a decimal number and notepad as a fraction. - Liquid soap
Three-member family enough liter of liquid soap for 30 days. After how many days the amount consumed when at the holidays come to us two cousins. - Map 2
At what scale is a map made if the distance 1.3 km corresponds to the map segment 4 cm long? - Cone and the ratio
The rotational cone has a height of 59 cm, and the ratio of the base surface to the lateral surface is 10: 12. Calculate the surface of the base and the lateral surface. - Quadrilateral
In the square ABCD point, P is in the middle of the DC side, and point Q is in the middle of side AD. If the area of quadrilateral BQPC is 76 cm², what is the area of ABCD? - Wheel
How many times turns the wheel of a passenger car in one second if the vehicle runs at speed 52 km/h? Wheel diameter is d = 60 cm. - Hiker
The hiker went on half of the trip on the first day, a third of the trip on the second day, and remains 24 km. How long was the trip he planned? - Garden
Father dug up the garden in 19 few hours. Son in 23 hours. How many hours does it take to dig up the garden together? - Inequation
Solve the inequation: 5k - (7k - 1)≤ 2/5. (5-k)-2 - Rotatable tower
The rotatable tower situated in the city center has the ground shape of a regular polygon. If the tower is rotated by 18° around its centerpiece, it looks from the side same. Your task is to calculate at least how many vertices can have a ground plan view - Christmas
Exactly after 114 hours, we sit down at the Christmas Eve table. What day and what time was it when Dad said this sentence? They sit at the Christmas Eve table exactly at the 18-o'clock (6 PM). - Soup
54% of pupils at the school eat in the canteen, 1/54 of students who eat in the canteen eat lunch soup. a) What percentage of pupils who eat in the canteen and eat soup for lunch? b) What percentage of all pupils of school eat lunch soup?
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