Maths practice for 11-year-olds. - page 107 of 226
Number of problems found: 4508
- Consecutive number sum
Five consecutive numbers give the sum of 220. Identify the smallest of them. - Robot kit savings
They have a third of everything in the kit store. Pepin has 1,200 crowns saved and wants to buy a space robot kit, which costs 1,950 crowns before the discount. How many crowns does he still have to save? - Cement foundation
How many kilograms of cement are used to concrete the foundations under the machine if the concrete slab has the shape of a cuboid 4.6 m long, 2.7 m wide, and 45 cm high if 250 kg of cement is used per 1 m³? - Block surface calculation
Calculate the surface of a block measuring 1 m, 2 m, and 3 m. - Toy car length
On the Christmas flyer, we find a toy car model reduced in a ratio of 1:43. What is the car's actual length in the picture in decimetres if the manufacturer states a length of 14 cm? - Bike departure time
Wes is supposed to be at the playground, 2.5 km away from his home, in 15 hours and 30 minutes. If he drives at 50 km/h, what time does he have to ride his bike to be on the field 5 minutes earlier? - Wooden box
The block-shaped box was placed on the ground, leaving a rectangular print with 3 m and 2 m. When flipped over to another wall, a print with dimensions of 0.5 m and 3 m remained in the sand. What is the volume of the wooden box? - Pool water calculation
How many liters of water are in a pool whose width is 12 m, length 25 m, and depth 280 cm if it is filled 10 cm below the edge? What area of the walls wet the water (in m2)? - On Turtle Island
The weather on Turtle Island is unusual. It always rains on Mondays and Wednesdays, it is foggy on Saturdays, and the sun shines on all other days. A group of tourists want to come to the island for a 44-day holiday. What day should the holiday start so t - Greece trips
People travel to the seaside in Greece for 8-day, 10-day and 12-day stays. An assigned delegate flies there and back with each group of passengers. On May 1, all three groups and their delegates will fly to the sea simultaneously. When will all three dele - Aquarium 20
Martin wanted to help his father build an aquarium. He read in the manual that it should have a volume of 45 litres. However, he did not have much space on the table; the base of the aquarium could be at most 25 cm by 40 cm. How tall does the aquarium nee - Triangle angle
An isosceles triangle has the size of the angles at the base alpha = beta = 34 degrees 34 minutes. Calculate the magnitude of the angle at the remaining vertex of the triangle in degrees and minutes. - On a
Someday, the Sun, Venus, and the Earth will be in eclipse, i.e., Venus will be between the Sun and the Earth. Venus orbits the Sun in 225 days. In how many years will all three bodies be in alignment again? - Flowerbed grass area
How large should we sow an area with grass in a circular flowerbed with a radius of 4 m? - Wheel turn calculation
The wheel has a radius of 31 cm. If we ride 1,168 km, how many times does it turn? - Quadrilateral prism
Calculate the volume and surface of a regular quadrilateral prism with a base edge a = 46 mm and a height v = 0.67 dm. - Juice can level
The juice is sold in cans with a radius of 30 mm and a height of 11 cm. There are 0.25 liters of juice in the cans. How many millimeters below the can lid is the level? - Second side
Calculate the length of the other side of the rectangle if its circumference is 60 cm, and one side is 10 cm long. - Cylinder surface volume
Calculate the surface and volume of a cylinder with a base radius of 5 cm and a height of 8 cm. - Block cube edge
The block and the cube have the same volume, 216 cm³. The block has side lengths of b = 4 cm and c = 9 cm. Can they have the same side?
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