Maths practice for 14 year olds - page 212 of 368

Number of problems found: 7346

Increase 7763
What number do we need to multiply by 20 to increase by 5%
Calculate 7762
Calculate the size of the diagonal of an ABCD square whose perimeter is 40cm
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 stored on a shelf if there is one three-part novel to be placed side by side?
Numbers 7755
How many digits 7 are in numbers from 1 to 777?
Grandmother
Mom walked out to visit her grandmother in a neighboring village 5km away and moved at a speed of 4km/h. An hour later, father drove down the same road at an average speed of 64km/h. 1) How long will it take to catch Mom? 2) What is the approximate distan
Difference 7742
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?
Performance 7737
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?
Double-digit 7736
How many double-digit numbers lie on the number axis closer to the number 31 than to the number 100?
Together 7735
The two typists wrote a total of 65 pages; although the former wrote an hour longer than the latter, she wrote 5 pp. Less; the second write 2 more pages per hour than the first. How many pages will they both write together?
Calculated 7733
There are nurses and horses in the stable. Juraj calculated that they have 11 heads and 36 all legs. How many people are in the stable?
Years 7729
Five years ago, Adam was seven times more than Peter and ten years more than Peter. How old is Adam older than Peter?
Direction 7728
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?
What 7723
What is 17% of 30% of 500?
Distance 7717
To what height does a 6.5 m long ladder leaning against a wall at a distance of 5.4 m reach?
Bucket 7714
A full bucket of water weighs 10kg. Half weighs 5.5 kg. How much does a bucket weigh?
Precisely 7713
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? Thank you very much for your help

Do you have homework that you need help solving? Ask a question, and we will try to solve it. Solving math problems.