Maths practice for 12-year-olds - page 188 of 352
Number of problems found: 7033
- Rubberized 19963
The circular pool with a diameter of 3.5 m is covered with a circular tarpaulin made of rubberized fabric for CZK 110 per square meter. Determine how much the tarpaulin cost if you know that its radius is 25 cm larger than the radius of the pool. - Determine 19953
The distance between the tip of the minute hand and the center of the dial is 12 mm. Determine the distance traveled by the tip in 45 min. (draw a clock face and a minute hand and realize the distance it will cover in 45 min.) - The freezer
1. The temperature inside a freezer is minus 23 degrees Celsius. The temperature falls by a further 12 degrees Celsius. What is the new temperature? 2. What is the difference between temperatures of 12 degrees Celsius and 210 degrees Celsius? - Kilometers
The scale of the map is 1:100,000. How long is the road, which is 4.7 cm long on the map, really long? - Five-digit 19873
Find the smallest five-digit number A432B that is divisible by 15. - Together 19833
Lucie, Jan, and Matej shared the candy in a ratio of 3:4:5. Matej got 20 sweets. How many candies did they share? - Rectangular 19823
Three hundred eighty-four tiles are used to cover the roof of 48 m². How many identical tiles are used for a rectangular roof measuring 6m and 9.5m? - Relationship 19813
When converting degrees Celsius (C) to degrees Fahrenheit (F), the relationship is used: F = C . 9/5 + 32. How many degrees Celsius are they in New York City if the thermometer reads 23 degrees Fahrenheit? - The excavation
The excavation for the city sewer was 38 m long, 2.2 m wide, and 3 m deep. a) How many cubic meters of soil were dredged b) How many journeys had to be made by one car when removing the soil if they loaded an average of 4.5 m of cubic soil on each journey - Cylindrical 19773
When we pour 3 l of water into a cylindrical tin can, the water rises to 20 cm. Calculate the average can. - Square sides
If we enlarge the side of the square by a third, its circumference will be 20 cm larger than the original. What is the side of the square? - Numbers 19743
The two numbers are in a ratio of 4:13, the first of which is 52. Which is the second number? - The bottle
The bottle contains 1.5 liters of mineral water. Pour all the water from the bottle into empty cups with a volume of 1/3 l. We will fill all but one to the brim. What part of the volume of the last cup is filled with water? - Radius of sphere
The surface of the sphere is 1256 cm². Calculate the radius of the sphere. - Integer cube
The length of the cube edge is an integer. Its volume is in cm3, a five-digit number divisible by 1331. What is the length of the edge of this cube? - Calculate 19653
Calculate the height of the rhombus ABCD on the side a if a = 58 dm and its area is 49.3 m2 - Granite 19643
The granite block weighs 8.7 tons. The density of granite is 2.9 g / cm³. Find the volume of the block in m³. - Magnitudes 19623
Calculate the magnitudes of the interior angles of a triangle if you know that these are in a 2:3:5 ratio. - Equation: 19613
Equation: 6 (x + 1) -4 (2x + 3) = 7 (x-1) +5 (9-x) - Circumference 19603
The rhombus has the dimensions a = 9.1 cm; b = 8 cm; height to side a: va = 7.3 cm. Calculate the circumference, area, and size of the second height.
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