Maths practice for 11-year-olds. - page 217 of 220

Number of problems found: 4398

Sea on the Moon
Assume that the Moon has a sea with the same composition as Earth's (it has the same saltwater density). Calculate the boat's dive floating in the sea on the Moon when on Earth, it has dived 3.9 m. Consider that the Moon has 6.5-times smaller gravitationa
Book
The printer used 4201 digits to number the pages of the thick book. How many pages does this book have?
Floor
The room's floor area is 33 m², and its width is 4 m. How many centimeters of circumference was measured on the floor on the map at the scale 1:75?
Cube corners
Peter cut the wooden cube with edge 100 cm in 2 corners of the cube with edge 5 cm. How many cubes of edge 5 cm can Peter even be cut?
Garden
The garden has two opposite parallel fences. Their distance is 39.7 m. The lengths of these two fences are 73.2 meters and 63.6 meters. Calculate the area of this garden.
Car - simple
The car is traveling at 77 km per hour. How long is the distance it can travel in 1 minute?
Stand-by power
Determine the year-round consumption of appliances in standby mode. Standby mode is a routine in the unit that is continuous for 24 hours and consumes a tiny amount of electricity. Typically are televisions, electric ovens, radios, computers, monitors, sa
Colors
Arnold got birthday 7 color pens in different colors. How many ways can he give them side by side in pencil?
Rounding
Double round number 235, first to tens, then to hundreds. (double rounding)
Plane
How many parts are divided in the plane 9 parallels?
Area
Calculate: x = 8 m² + 8 dm² + 8 cm²
Denominator
Calculate the missing denominator x: (119)/(17) = (7)/(x)
Hole
They fill the shape hole with dimensions 2.7 m, 20 m, 15.8 m with 282 m³ of soil. How much percent does it fill up?
Divisibility 2
How many divisors have integer numbers 80?
Divisibility
Determine all divisors of a number 91.
Cube
Calculate the surface cube with edge 11 dm.
Triangle P2
Can a triangle have two right angles?
Triangle
Prove whether you can construct a triangle ABC if a=8 cm, b=6 cm, c=10 cm.
3-bracket 2
Maybe the smallest angle in the triangle is greater than 70°?
3-bracket
Maybe the largest angle in the triangle is less than 20°?

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