Maths practice for 11-year-olds. - page 219 of 221

Number of problems found: 4414

Special cube
Find the edge length of a cube whose surface area and volume are numerically equal.
Cube
The sum of all edge lengths of a cube is 56 cm. What are its surface area and volume?
Date game
Let now is Tuesday. What day is after 229 days? Write the result as a number: 1=Monday, 2=Tuesday, 3=Wednesday, 4=Thursday, 5=Friday, 6=Saturday, 7=Sunday.
Isosceles triangle
Calculate the perimeter of an isosceles triangle with leg length 87 cm and base length 95 cm.
Minute angle
Find the angle swept by the minute hand of a clock in 30 minutes.
Guess number
With what number should be divided, number 10387 to be reduced by 30%?
Angles
A triangle has one exterior angle of 82°6' and one interior angle of 48°36'. Calculate the other two interior angles of the triangle.
Tourist
Tourists walk at 4.2 km/h. They take a 10-minute break every 6 km. How many kilometres did they walk if they started at 4:40 and finished at 21:40?
Train
A train travels a section of line in 55 minutes at a speed of 70 km/h. At what speed would it need to travel to shorten the journey time by 16 minutes?
Right triangle
A right triangle has legs of lengths 71 dm and 919 mm. Calculate the area of this triangle.
Circle
What is the area of a circle whose circumference is 51.2 cm?
Fan
A fan rotates at 217 RPM. Calculate the period of one rotation.
DIY press
Under the socialist regime, in some socialist countries, owning a typewriter required special permission. That has hindered the spread of DIY literature (manually transcribed through carbon copy paper for typewriters). Calculate how many typewriters today
Aquarium II
Calculate how much glass is needed to build a rectangular aquarium with a base of 65 cm × 52 cm and a height of 74 cm, assuming 2% waste. The aquarium has no top.
Thrift woman
Calculate how long a grandmother must save to buy new shoes priced at 116 euros if she saves 2 EUR per month.
Number
Calculate the integer number divided by 24, gives 16 and the rest 7.
Air mass
What is the mass of the air in a classroom with dimensions 10 m × 3 m × 3 m? The density of air is 1.293 kg/m³.
Solid in water
The solid weighs in air 16.1 kg and in water 13 kg. Calculate the density of the solid.
Promile
Calculate the 17.6 ‰ of 353.
Tesco Clubcard
František got quarterly billing vouchers for Tesco ClubCard, taking goods worth 6.5 Eur. Calculate the average monthly amount Tesco stores bought goods. Tesco ClubCard works for every Euro spent; you get one ClubCard point, which Tesco will convert to one

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