Maths practice for 12-year-olds - page 165 of 347
Number of problems found: 6923
- School trip students
Pupils paid 6 b for a total of CZK 1,000 for a school trip. They paid a total of CZK 230 for the train and another CZK 35 for lunch. How many students were on the trip? - Quarter of an hour
If the clock showed a quarter of an hour more, it would be 10 minutes to 10 hours. How many hours do they show? - World travel time
The speed of the car is 23.45194840364737364738 km/h. How many hours will it take to travel around the world? - Calculate expr
Calculate the example with decimal numbers: -5 + (- 14 + 11) • [24-2 • (-0,4)] - {- 28-41 • [-8 • 2 + 4 • 1 • (0,1-2,4)] + 1} = - Prime divisor
Calculate three-fifths of the ratio of the product and the sum of all prime divisors of 240. - Point distance shape
What geometric shape do all points in the plane have the same distance from a given point in the plane? - Parentheses expression evaluation Evaluate the expression with parentheses: 12 • (-4,3) + 3 • [14- (23-4 • 5)] - 2 • {36- [18- (28-76)]} =
- An airplane
An airplane flies 1440 km in 2 1/4 hours. What is its average speed in km per hour? - Fence pole distance
The fence is built of 25 poles. The distance between the bars is 150 cm. What will be the distance between the individual poles if we make a fence of 19 poles of the same length? - Painter hiring
Twelve painters will paint all the rooms in the hotel in 75 hours. How many painters must the operating staff hire when the rooms have to be painted in 60 hours? - Map distance
On a map with a scale of 1:250000, the distance between the two mountain peaks is 32 mm. What is the actual length in km? - Length 7
Length equals 7/6 inch in width equals 7/9 inches the area is? - Dividing walnuts into crates
There are 8 and 2 over 3 pounds of walnuts in a container. The walnuts will be divided equally into containers that hold 1 and 1 over 5 pounds. This would fill n and four over 18 containers. What is n? - Alarm clock
Peter has an inaccurate alarm clock. He found that he was exactly 4 minutes late every hour. At 21:30 in the evening, he will set the exact time for it. What must alarm time be on him to wake him up at exactly 06:30? - Volume per time
The length of the cube-shaped tank edge is 4 m. A pump has a capacity of 200 l per minute. How long does it take for a pump to fill a cube-shaped tank up to 75% of its height? - Wooden cube
Find the weight of a wooden cube with an edge of 3.5 dm if the wood's density is 0.7 g/cm³. - Dance ensembles
Four dance ensembles were dancing at the festival. None had less than ten and more than 20 members. All dancers from some of the two ensembles were represented in each dance. First, 31 participants were on the stage, then 32, 34, 35, 37, and 38. How many - Cooler place
The temperature recorded in Simla is -4 °C and in Kufri is -6 °C on the same day. Which place is cooler on the day? - Subtracting sets
For two sets K, L is true: K has 30 elements, L has 27 elements, and the set L - K has 22 elements. How many elements does the set K - L have? - Swimming pool
A swimming pool 30 meters long is filled with water to a depth of 1 meter at the shallow end, and 5 meters at the deep end, and abcd the vertical area of the pool has the shape of a trapezium with the area given by S(abcd)= 1/2 (ab + cd) x ad. What is the
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