Maths practice for 14 year olds - page 97 of 378
Number of problems found: 7551
- Four-digit 64504
Writing a four-digit number ends with the number 5. If we move this number to the first place, we get a number 531 larger than the original. Specify the original number. - Probability RGB
The bag has six red, five green, eight blue, and 11 yellow balls. What is the probability that we will pull out a green ball? - Parallelogram 64414
The parallelogram has side a = 58cm and diagonals u = 89cm and v = 52cm. Calculate the perimeter and area of this parallelogram. - Arithmetic 64394
Karolína does not want to reveal at home what grades she will get on her report card. She said only this: "There will be 8 marks on the report card, their arithmetic mean is 2.125, the median is 2, the mode is 1, and I will not have any 2's. How many four - Percentages 64334
In the first delivery of 120 parts, there was 5% waste. In the second delivery in which, 10% of the 80 were scrapped. How much scrap was brought in with the first and second deliveries combined? What % of scrap was there in both deliveries of parts, out o - Increased 64324
The number of books in the city library increased by 0.2% in 2008 and 0.6% in 2009. At the same time, the total number of books remained less than 300,000. How many books were added to the city library in 2009? - Centimeter 64224
A ladder leans against the wall. It touches the wall at the height of 340 cm, and its lower end is 160 cm away from the wall. How long is the ladder? Express the result to the nearest centimeter.
- Employees 64184
The company employs 20% more women than men and 240 women. How many employees are there? - Brigadiers 64164
Temporary workers Ivan, Lea, and Dana earned a total of 480 euros. Ivan made a third of that money. Lea and Dana earned the remaining money in a 3:1 ratio. How many euros did Leo earn? - Completed 64134 Six workers will do the work in 8 hours. How many workers must be added if the work is to be completed in 3 hours?
- Individual 64124
The line is divided into two parts in a ratio of 4:7. The difference in lengths of individual parts is 18 cm. What is the length of the line in cm? - Circumference 64104
The ABC triangle has a circumference of 11 cm. Triangle A'B'C ', similar to triangle ABC, has side lengths of 6 cm, 120 mm, and 1.5 dm larger than triangle ABC. Calculate the area of the triangle A'B'C '. - Right-angled 64084
A right-angled triangle ABC with sides 5 cm and 12 cm is described by circle k. Calculate the length of circle k in centimeters. When calculating, use π = 3, 14 and round the result to tenths. - Represent 64064
Together, they keep 110 poultry (hens, turkeys, ducks, and geese) on the farm. Hens represent half. There are ten turkeys and seven ducks, more than geese. How many geese are kept on the farm? - Technical 64054
What is the actual length of the product in cm, which is 8 cm long on a 5:2 scale technical drawing?
- Represented
The children of 5A wrote a math test. The class had 29 children. After evaluation, there were two more units than cents, the mark 3 occurred three times, the mark 2 represented twice the number of units, the mark 4 did not occur. How many ones, twos, thre - Deposit
At the beginning of the year, Michael's father opened a bank account in which he deposited 1,800 euros. At the end of the year, he had 1,845 euros in his bank account. What was the annual interest rate in percent? - Distances 64024
Eleven trees are planted on the street at equal distances. If they planted three more trees, the spaces between them would be 12 m shorter. What is the distance in meters between the first and the last tree? - Probability
Two duelists have agreed to fight at a designated location between (6:00 and 7:20). One of them will wait 8 minutes after arriving at the location and then leave. The other will wait for his opponent for 16 minutes and then leave. What is the probability - Original 63974
If we reduce the length of the cube edge by 30%, this cube has a reduced surface area of 1176 cm². Find the edge length and volume of the original cube.
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