Natural numbers - practice for 14 year olds - page 13 of 25
Number of problems found: 493
- Determine 4132
Determine the value of x in this equation: x! · 4 = x³. x is a natural number. - Sequence
The arithmetic sequence is given: Sn=2304, d=2, an=95 Calculate a1 and n. - Gauss
Help little C.F. Gauss sum all the integers from 1 to 400. - Endless lego set
The endless lego set contains only 6, 9, and 20-kilogram blocks that can no longer be polished or broken. The workers took them to the gym and immediately started building different buildings. And, of course, they wrote down how much the building weighed.
- Four pupils
Four pupils divided euro 634 so that the second received 30% less than the first, the third 1/5 less than a fourth, and the fourth euro 95 less than the first. How much money had each of them? - In the 14
In the survey, the barangay had a certain number of families, and 60% of them identified as belonging to the marginalized sector's poor if the total families were 150. How many families belong to the poor sector? - 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? - Population 83002
Calculate how many people were born in the state; if the total population was 10,000,000 this year, the natural increase was 2%, and 5,000 people died. - Participate 7616
Two hundred fifty students were to participate in the discussion on the dangers of drugs. 8% of them did not participate in the debate. How many students were in the discussion?
- Successful 6077
The natural history test contained 21 questions. The teacher evaluated each question by two points. Milan wrote a test for 39 points. At what percentage was Milan successful? - Fish population
The number of fish in a lake decreased by 10% during one year. Last year there were 500 fish in the lake. What is the fish population this year? - Already 82989
The book has 1200 pages, of which Róza has already read 60%. How many pages has Rose not read so far? - Students 45261
There are 200 pupils in the class, 40% of whom cannot swim. How many students can swim? - Volunteers 81981
Volunteers planted saplings in the forest nursery; spruces made up 55% of all saplings; one-third were edible, and the rest were young pines. How many saplings did they plant if the number of saplings was greater than 1060 and less than 1090?
- Capacity 82231
There were 60 people in the stadium, which was 30% of capacity. How many people can fit in the stadium? - Students 48473
There are 30 students in the class. 70% of them have one sibling. How many students have one sibling? - What 37901
What is more, 14% of 27 or 15% of 28? - Harry
Harry Thomson bought a large land in the shape of a rectangle with a circumference of 90 meters. He divided it into three rectangular plots. The shorter side has all three plots of equal length. Their longer sides are three consecutive natural numbers. Fi - Received 47171
Four boys shared 100 marbles. The second received 20% more than the first, the third received 20 more bullets than the first, and the fourth received 0.8 times more bullets than the first. How many marbles did each boy get?
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