Maths practice for 14 year olds - page 216 of 375
Number of problems found: 7492
- 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? - Digit Count Numbers Sequence
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 - 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 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?
- Stable people count
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? - Age comparison puzzle
Five years ago, Adam was seven times more than Peter and ten years more than Peter. How old is Adam older than Peter? - 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? - Bucket Water Weight Empty
A full bucket of water weighs 10kg. Half weighs 5.5 kg. How much does a bucket weigh? - 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? Thank you 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). - Sales off
The price has decreased by 20%. How many percents do I have to raise the new price to be the same as before the cut?
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