Maths practice for 14 year olds - page 341 of 380
Number of problems found: 7584
- Velocity ratio
Determine the ratio at which the fluid velocity in different parts of the pipeline (one piece has a diameter of 5 cm and the other has a diameter of 3 cm) when you know that every point of the liquid is the product of the area of the tube [S] and the flui - Book
Alena read a book at a speed of 15 pages per day. If she read twice as fast, she should read a book four days earlier. How many pages have a book? - Rhombus 2
Calculate the rhombus area with a height v=48 mm and shorter diagonal u = 60 mm long. - Theatro
480 spectators attended the theatrical performance. Women were in the audience, 40 more than men and children, 60 less than half of the adult spectators. How many men, women, and children attended a theater performance? - Scouts
Scouts purchased two types of camp cans for a total cost of 1460 CZK. The first can cost CZK 32, and the second cost 25 CZK. How many cans were purchased for each type? - 5 pumps
Five pumps to pump 3 hours 1600 hl of water. How long pumped the same amount of water from four pumps? - Legs
There are four-legged chairs and three-legged stools in the room, all fitted with (one) person. I counted all the legs in the room, and there were 39. How many chairs, stools, and people are there?
- Max - cone
The workshop must produce the greatest cone from the iron bar (shape = prism) with dimensions 6.2 cm, 10 cm, and 6.2 cm. a) Calculate cone volume. b) Calculate the waste. - Cardboard box
We want to make a cardboard box-shaped quadrangular prism with a rhombic base. The rhombus has a side of 5 cm and 8 cm, one diagonal long. The height of the box is 12 cm. The box will be open at the top. How many square centimeters do we need if we calcul - Water level
How high is the water in the cylindrical barrel with a diameter of 12 cm if there is a liter of water? Express in cm with an accuracy of 1 decimal place. - Barrel 3
The barrel with water weighs 118 kg. When we get off 75% of water, it weighs 35 kg. How many kg has an empty barrel? - Wheels
A small tractor wheel with a diameter of 60 cm must be rotated eight times to overcome some pathways. How many times must you turn the big tractor wheel with a radius of 60 cm to overcome the same distance? - Mushrooms
For five days, we collected 410 mushrooms. Interestingly, we collected ten mushrooms more every day than the preceding day. How many mushrooms have we collected during the 4th day? - Divisible by 5
How many three-digit odd numbers are divisible by 5, which is in place of ten's number 3? - Vacation
Smiths paid a deposit for a vacation of two-sevenths of the total vacation price. They then also paid € 550. How much cost their vacation?
- Raffle
How many raffle tickets must be purchased by Peter in a raffle with issued 200 tickets if he wants to be sure to win at least a third price? The raffle draws 30 prices. - Three-fifths 1651
Anna bought something for one-third of her savings. She spent three-fifths of the remaining money on her parents' gifts. She has 400 euros left now. How many euros did she save before spending? - Olympics
How many ways can six athletes be placed on the podium at the Olympics? Depends on the color of the metal. - Mortgage
Family XY wants to take the bank mortgage (a loan for an apartment/house) for € 100,000. Bank processing the mortgage charges a fee of 0.79% of the amount borrowed. How many euros is this fee? - School
The school attends 792 children, boys and girls ratio is 4:5. How many more girls go to school (than boys)?
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