Maths practice for 11-year-olds. - page 20 of 227

Number of problems found: 4524

Cost of a Cake
Half a cake costs €7 more than a quarter of a cake. How much does the whole cake cost?
The denominator
Find unknown denominator in fraction inequality: 6/5>41/_>8/7
Aluminum - density
The density of aluminium is 2,700 kg/m³. Calculate the mass of an aluminium cube with a volume of 80 cm³.
Sifted sand
At a construction site, sand used in mortar is sifted through a sieve. In the process, 1/6 of the coarse material does not pass through and is discarded. Determine how many cubic metres must be brought in to obtain two cubic metres of sifted sand.
Balls 6
Jane has balls in her bag that can be divided equally among 4, 5, or 6 children. What is the minimum number of balls Jane could have in her bag?
Goods - two thirds
How much did the goods cost if 2/3 of them cost 450 euros?
Rectangle - perimeter, side
From the formula for the perimeter of a rectangle, express the length of side b and find its value for o = 28 cm and a = 7.5 cm.
Two-Fifths of 175
What is two fifths of 175?
Minutes in Fractional Hour
How many minutes is five sixths of half an hour?
Classmates 2
Classmates Peter, Vlado, and Michael arrived late to school. Peter was 1/4 hour late, Vlado was 2/8 hours late, and Michael was 4/16 hours late. How many minutes late was each of them?
Dice Rolls for Sum
Stella rolls a standard six-sided die. How many times does she have to roll the die to be sure that the sum of the results will be at least 4?
Write 18
Write as a fraction what part of a day Tina spent on various activities: a) sleep: 9 hours, b) school: 6 hours, c) television: 0.5 hours, d) studying: 1.5 hours.
Adjacent Angles Calculation
Angles alpha and beta are supplementary. Calculate the size of angle beta if alpha is 57°.
Total
How many trees are in an orchard if one seventh of all trees are cherry trees, one quarter are pear trees, half are apple trees, and the remaining 3 trees are plum trees?
DEnsity of a cuboid
What is the density of a building board in the shape of a cuboid with dimensions 1 m × 20 cm × 20 cm, if its mass is 84 kg?
Consecutive Numbers Sum
Can you find three consecutive whole numbers such that the sum of the first and third is 128?
Truck bed
Calculate how many truckloads are needed to transport grain from the combine hopper. The hopper is a prism with a rhombus-shaped base with sides of 13 dm and a height of 2.8 m to the longest side. The hopper is 200 cm long. The truck bed is a cuboid with
Bottom diameter
Milo poured 2 dl of fruit juice into a cylindrical glass with a base diameter of 6 cm. How high did the juice level reach in the glass?
Glass vessel
The cylinder-shaped glass vessel is 1 m high and has a volume of 196.25 l. Calculate the diameter of the container.
Cylindrical column
What is the mass of a reinforced concrete cylindrical column with a radius of 30 cm and a height of 4.5 m if the density of reinforced concrete is 2400 kg/m³? Round the result to whole kilograms.

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