Math practice for 13 year olds - page 360 of 424
Number of problems found: 8461
- Diagonally 2838
The square plot has an area of 324m². Calculate the length of the road that runs diagonally across the plot.
- Points 2836
Three dice throw a total of 12. Green has two times more than red. Blue is two times less than green. How many points are on each cube?
- Complete 2833
The tiler covered 3/5 of the wall with tiles in two hours and 45 minutes. How long did it take to complete the entire lining area at the same power? How long did the whole job take him?
- Numbers 2832
The sum of two numbers equals 840. The first number makes up 40% of the second number. Specify both numbers.
- According 2831
The owner of the house received two different plans for the new building. One with a scale of 1:100, followed by the builders, and the other with a scale of 1:25, according to which he will finish the interior. In the first plan, his living room was 7 cm
- Discovered 2830
A walker who had covered 2/3 of the planned hiking route discovered that he had lost his map. He came back for her. After overcoming 1/4 of the route he had already traveled, he found the map. He then continued in his original direction. When he had walke
- Two-thirds 2829
If we pour one-fifth and then another 50 liters from the barrel, two-thirds of the original volume will remain in the barrel. What is the volume of the barrel?
- Martin 2828
Twelve years ago, Martin was three times older than Pavol. Now, Martin is twice as old as Pavol. How old is Martin now, and how old is Pavol?
- Registers 2827
When eight cash registers are open in the grocery store, customers wait for an average of 12 minutes. What will the waiting time be if the other two cash registers open?
- Younger 2826
Milan and Juraj are a total of 56 years old. Milan is eight years younger than Juraj. Please find out how old each of them is.
- Distributed 2825
The king distributed his horses to the three sons in a ratio of 7:6:4. The eldest son received 63 horses, the most of all the brothers. How many horses did the king share with his sons?
- Three-fifths 2823
The student worked 27 hours, fulfilling three-fifths of his commitment. How many more hours should he work to fulfill his promise? How many hours should he work to meet his 120% commitment?
- Originally 2822
There were plums in the basket. They doubled their number and then took 8 plums. They doubled the number of plums left in the basket again and took 8 plums. They doubled the number once more and took 8 plums. Then, there was no plum left in the basket. Ho
- Conservationists 2820
A group of nature conservationists (a total of 28 members) and a sports team (16 members) worked for 7 days to clean up the forest park with an area of 10 ha. How many days would conservationists have to work without the help of athletes?
- Two-fifths 2819
The petrol tank is filled to three-quarters of its volume. After running out of 875 liters of gasoline, it was filled to only two-fifths of the volume. How many liters does a full tank have?
- Gardeners 2818
Five equally skilled gardeners mowed one-third of the park in 12 hours. How many gardeners need to be called to mow the rest of the park in 8 hours?
- Equality 2817
Fill in the boxes with the same numbers so that equality applies: 550:? =? x 22
- Sometimes 2814
Adam was at some of his favorite football team's home games last season. Sometimes, he bought a seat ticket for €9, sometimes a standing ticket for €5. He spent a total of €76. How many times did Adam buy a seat ticket, and how many times did he buy a sta
- Percentage 2813
In the classroom, 60% of students have good academic results. 20% of them are honored. What percentage of students in the class are honored?
- Obtained 2812
45% of pig iron is obtained from iron ore, and 70% of steel from it. How much steel is made from 100 tons of iron ore?
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