Maths practice for 12-year-olds - page 231 of 347
Number of problems found: 6923
- Surface of Quadrilateral Prism
Calculate the surface of a quadrilateral prism two dm high, the base of which is a square with a side of 15 cm. - Square Rolling Line Turns
The square has a side x cm long. How often does it "turn" when we roll it along a line d cm long? - A man
A man spends 5/9 of his money on rent and 5/16 of the remainder on electricity. If the final balance remaining is 550, find how much was spent on rent. - Fish Drink Price Problem
Five boxes of fish and three bottles of drink cost 276 CZK, three boxes of fish and two bottles of drink cost 176 CZK, and two boxes of fish and one drink bottle cost 176 CZK. Thus, we pay 276 CZK for two boxes of fish and one drink bottle. - Remaining
Aladár promised his mother that he would wash the dishes. To avoid getting too tired, he divided the work into four stages. First, he washed one quarter of all the plates. After a short rest, he washed one sixth of all the plates. After a long rest, he wa - Base of house
Calculate the volume of the bases of a square house. If the base depth is 1.2 m, the width is 40 cm, and the outer circumference is 40.7 m. - Wine Sugar Content Cubes
A bottle of red semi-sweet wine with a volume of 0.75L has a sugar content of 18-45g/dm³. How much is it in terms of sugar cubes? - Clothes
Dana and Jane collect clothes. Dana had nine more items than Jane, so she gave Jane 7. Who now has more clothes, and by how many? - Turtle Daughter Age Difference
Turtle Dorota is 158 years old, and her daughter Dorotka is 71 years old. How many years ago was Dorota 30 times older than her daughter? - Inscribed
The cube is inscribed in the cube. Determine its volume if the edge of the cube is 10 cm long. - Metal rails
Dad needs to improve the edges of the wooden boxes, which are to be reinforced with metal rails. How many cm of rails will he need if the box has the shape of a prism and the length of the edges is 70 cm, 70 cm, and 120 cm? - Scale of plan
On the village plan on the scale of 1:1000, a rectangular garden is drawn. Its dimensions on the plan are 25 mm and 28 mm. Determine the area of the garden in ares. - Reading every day
Alena calculated that reading ten pages of the book every day would take her 18 days. However, a week later, she decided to read 11 pages every day. How many days did it take her to read the book? - Circular pool
The 3.6-meter pool has a depth of 90 cm. How many liters of water are in the pool? - Container Meat Weight
I have a 20 cubic meter container. How many tons of green BIO meat will fit in the container? - Iron pole
What is the mass of a pole with the shape of a regular quadrilateral prism with a length of 1 m and a cross-sectional side length of a = 4.5 cm made from iron with density ρ = 7800 kg/m³? - Marble bag
A marble bag sold by Rachel's Marble Company contains five orange marbles for every six green marbles. How many green marbles does it contain if a bag has 35 orange marbles? - Triangle Line Two Points
Draw an arbitrary triangle ABC and a line o to have exactly 2 points in common with the triangle. - Jane and father
Jane is four years old. Her father is six times as old as she is. After how many years will the father's age be three times his daughter's age? - Paint for Swimming Pool
The bottom of the pool at the family house has a rectangular shape with dimensions of 5 m and 3.5 m. Its height is 1.2 m. How many kg of acrylic paint are needed to paint the bottom and walls of the pool if 1 kg of paint is enough for 6 m²? The coating is
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