Maths practice for 12-year-olds - page 46 of 362
Number of problems found: 7228
- Triangles - combinations
How many different triangles with sides in whole centimeters have a perimeter of 12 cm? - Two cubes 3
Two cubes modeled from plasticine have single-digit integer edge lengths with a difference of 1 cm. Can one large cube with an integer edge length be modeled from the same amount of plasticine? - Percent 84011
What percent is 70 of 35? - Family - land
The Vesely family bought a plot of land measuring 30 1/2 m and 26 2/3 m. Before they start building, they want to fence it. How many meters of mesh do they need to buy if they leave 2 7/8 m for the gate? - Probability - target
A target is divided into two zones. The probability that the shooter will hit zone 1 of the target is 21%; that he will hit zone 2 of the target is 48%. What is the probability that the shooter will hit the target? - Mirka 2
Mirka is saving for a bicycle. She already has 336 euros. That is 1/5 more than half the price of a bike. How many euros does a bicycle cost? - Suitcase - rod
The trunk of a car has the shape of a cuboid with sides 1.6m x 1.2m x 0.5m (width, depth, height). Determine the longest thin rod that can be placed on the bottom.
- Strawberry - mililiters
The volume of a strawberry cocktail is 1250 ml. How many liters is it and convert it to fractions? - Toy car collection
Martin has more than 50 and less than 100 toy cars in his collection. A fifth of them are trucks, an eighth are vintage cars and the rest are models of current passenger cars. How many toy cars does Martin have in his collection and how many of them are p - Sixths 83987
How much is three and five-sixths less than four and five-ninths? - That: 83969
Find x such that: a) 2 : 5 = 8 : x b) x : 28 = 4 : 7 - Distance - cities Determine the actual distance between two cities if their distance on the map is 7.5 cm and the map scale is 1:60,000.
- Detergent - dilution
The detergent is diluted in a ratio of 1:200. How much detergent do we need if we use 5 liters of water? - Number split
Divide 36 in the ratio of 4:5. - Tickets 83964
9 tickets cost 153 CZK. How much do 11 tickets cost?
- Visitors
The first holiday weekend, 1250 visitors came to the swimming pool in Zdice. Sunday was not so nice, so two-thirds of the number of visitors who were at the swimming pool on Saturday came. How many visitors were there on Saturday? - Liquid - pouring We need to pour liquid from two cube-shaped containers into one container. The original containers have edges of 0.7 m and 0.9 m. What will be the edge length of the cube of the common container?
- Salesman 4
The salesman sold 3/5 of the potatoes on the first day and 2/3 of the rest on the second day. What fraction of the potatoes did he sell in two days? What fraction of the potatoes did he have left? - Quarter 83940
Half a cake costs 7€ more than a quarter of a cake. How much does a cake cost? Thank you - 23 students
The ninth grade students went on a field trip in such a number that they could sit at tables of 4, 5, and 6, and each time one seat remained free. What is the smallest number of students who participated in the field trip?
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