Maths practice for 12-year-olds - page 308 of 362
Number of problems found: 7223
- Four-fifths 2764
There were 60 people at the rink, four-fifths of which were children under 15 years of age. A ticket for children under 15 costs €1 and for adults €2. a) How many children were there at the rink? b) How many adults were there? c) How many euros did they c - Dimensions 2761
The model aircraft is made on a scale of 1:250. Length is 200mm, wingspan 200mm. Find the dimensions of the actual aircraft. - Workers
Four workers plan to work on the gym floor for six hours. After an hour of working together, one of the workers went to the doctor. How long will it take the remaining three workers to finish the job? - Determine 2757
The sum of all divisors of a certain odd number is 78. Determine the sum of all divisors of twice this unknown number. What is an unknown number? - Octopuses 2755
Both octopuses have 112 tentacles. The pink octopus has 20 tentacles less than the yellow. How many tentacles does a pink squid have, and how many tentacles does a yellow squid have? - By dosing
A dairy uses a new and an old line to dose yogurts. By dosing yogurts on the old line, the order is fulfilled in 6 hours. If both lines work together, they will fulfill the same order in 2 hours. How many hours will it take to fulfill such an order if the - Including 2753
Martina helped the coach write diplomas. It took her 3 minutes to write her first diploma and her next 2 minutes. How many minutes will it take her to write n = 14 diplomas/including the first/if she works at this pace?
- Simonka 2752
Is Simona right if she says that an iron cube with an edge length of 10 cm is heavier than a pound (1 cm³ of iron weighs 7.25 g)? - Cube-shaped 2751
What weight will a cube-shaped concrete base with an edge length of 10 m have if one concrete cube weighs 2200 kilograms? - Recommended dimensions
Michael bought an aquarium in the shape of a block with dimensions of the bottom 30 cm x 15 cm and a height of 20 cm. The salesman recommended that he fill the aquarium with water only up to a height of 15 cm. How many liters of water does Michael have to - Measuring 2747
We poured 1 liter of water into an aquarium measuring 20 cm x 20 cm and 25 cm high. How high does the water in the aquarium reach? - Distributes 2746
Monika distributes candy. Half of a fifth of them are 14 candies. How many sweets did Monika have? - Snails
How many liters of water will fit in an aquarium with bottom dimensions of 30 cm and 25 cm and a height of 60 cm if we pour water up to a height of 58 cm? How many snails can we keep in an aquarium if we know that snails need 600 cm³ of water for their li - Expensive 2740
The product became more expensive by 25%. By what percent of the new price does he have to reduce for his price to be equal to the original price? - Original 2739
Dresses on sale have become cheaper twice: first by 12%, then by 25% of the new price. What% of the original price was the final price?
- Diagonal 2738
ABCD square has a diagonal length of 8 cm. What is the area of the square? - 15-meter-long 2735
The swimming pool also has a 15-meter-long pool 8 meters wide with a constant depth of 2 meters. If it is always filled 10 cm below the edge, how many hectoliters of water can fit in it? - Participant 2734
Each participant on the school trip has to pay € 7 for the booked bus. Three students fell ill and did not go on a trip. Everyone then had to pay € 8 for the bus. How many students took part in the trip? - Diameter 2733
If we cut a tree trunk with a diameter of 42 cm and the width of the cutting joint is 3 mm, how many cubic cm of wood will turn into sawdust? - Smallest 2732
The sum of the three numbers is 77. The largest of them is three times the smallest, and the middle is half of the largest. Write all the summands.
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