Maths practice for 14 year olds - page 212 of 361

Number of problems found: 7217

Rectangular field
A rectangular field has a diagonal length of 169 m. If the length and width are in the ratio of 12:5. Find the field's dimensions, the field's perimeter, and the field's area.
Cuboid Dimensions Ratio Surface
The base of a cuboid is a rectangle. The ratio of its length to width is 3:2. The length of the rectangle of the base is in the ratio of 4:5 to the height of the block. The sum of the lengths of all the edges of the block is 2.8 m. Find: a) the surface of
Number Multiply Increase Percent
What number do we need to multiply by 20 to increase by 5%
Square diagonal calculation
Calculate the size of the diagonal of an ABCD square whose perimeter is 40 cm
Tetrahedral pyramid
Calculate the surface S and the volume V of a regular tetrahedral pyramid with the base side a = 5 m and a body height of 14 m.
Three-part novel
In how many ways can seven books be arranged on a shelf if the three volumes of a novel must always be placed side by side?
Digit Count Numbers Sequence
How many digits 7 are in numbers from 1 to 777?
In the orchestra
In the school orchestra four musicians play – one the violin, one the clarinet, one the cello, and one the trumpet. During a performance not always all four play at once. Sometimes only one instrument plays, sometimes two, sometimes three, and sometimes a
Two number difference
The difference between the two numbers is -85. Their sum is 89. Determine these numbers.
Practice
How many ways can you place 20 pupils in a row when starting on practice?
Push-up work calculation
Zdenek, weighing 54 kg, made 15 push-ups on the crossbar. The height he reached was about 40 cm. What kind of work did he do? What would have been his performance if the whole exercise had taken him a minute and a half?
Number axis distance
How many double-digit numbers lie on the number axis closer to the number 31 than to the number 100?
Two Typists Pages Written
The two typists wrote a total of 65 pages; although the first typed for an hour longer than the second, but typed 5 pages less; the second types 2 more pages per hour than the first. How many pages per hour does each typist write?
Swimmer direction time
Two swimmers trained together in a small pool. Swimmer Pike will swim the pool in 16 seconds and swimmer Kaprik in 20 seconds. Both swimmers suddenly jumped into the pool from the same edge and, for 160 seconds, swam along the length of the pool back and
Three segments
The circle is divided into three segments. Segment A occupies 1/4 of the area. Segment B occupies 1/3 of the area. What part is occupied by section C? In what proportion are areas A: B: C?
Percentages
52 is what percent of 93?
Percentage of Percentage
What is 17% of 30% of 500?
Ladder wall height
To what height does a 6.5 m long ladder leaning against a wall at a distance of 5.4 m reach?
Red and White Marbles
There are only red and white marbles in the bag, and precisely 18% of the marbles in the bag are red. After removing 25 white balls, exactly 20% of the balls in the bag will be red. How many balls are there? very much for your help
Ladder Shadow Length
Calculate the length of the shadow of a ladder 8 m long leaning against a 6 m high wall. (the sun shines perpendicular to the ladder - see picture).

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