Maths practice for 11-year-olds. - page 218 of 221

Number of problems found: 4418

Book
The printer used 4201 digits to number the pages of the thick book. How many pages does this book have?
Floor
A room has a floor area of 33 m² and a width of 4 m. What is the perimeter of the room as shown on a map at scale 1:75, measured in centimetres?
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
A garden has two opposite parallel fences separated by a distance of 39.7 m. The lengths of these two fences are 73.2 m and 63.6 m. Calculate the area of this garden.
Car - simple
A car is travelling at 77 km per hour. What distance does it cover 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 received 7 coloured pens of different colours for their birthday. In how many ways can they be arranged side by side in a pencil case?
Rounding
Round the number 235 twice: first to the nearest ten, then to the nearest hundred. (This is called 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
A hole with dimensions 2.7 m × 20 m × 15.8 m is filled with 282 m³ of soil. What percentage of the hole is filled?
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 a triangle ABC with the given properties can be constructed: a=8 cm, b=6 cm, c=10 cm.
3-bracket 2
Can the smallest angle in a triangle be greater than 70°?
3-bracket
Can the largest angle in a triangle be less than 20°?
The Line segment
Can we construct a line segment if we know: end point and one point inside line

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