Maths practice for 12-year-olds - page 316 of 362
Number of problems found: 7223
- Hexagon - MO
The picture shows the ABCD square, the EFGD square, and the HIJD rectangle. Points J and G lie on the side CD and are true |DJ| - School books
At the beginning of the school year, the teacher distributed 480 workbooks and 220 textbooks. How many pupils could have the most in the classroom? - MO 2016 Numerical axis
Cat's school uses a special numerical axis. The distance between the numbers 1 and 2 is 1 cm, the distance between the numbers 2 and 3 is 3 cm, between the numbers 3 and 4 is 5 cm, and so on, and the distance between the next pair of natural numbers is al - Determine 2385
Determine x if 98% of x equals 196. - Nine balls
Imagine that you have exactly the same appearance as nine balls, of which one has a greater mass than the other. You have isosceles weights. Post a procedure as you would using weights to discover heavier balls. How many measurements at least do you have - Expressions: 2381
Determine the values of the following expressions: a) 3² - (- 4) b) 4-321 c) -32-7 - Car mileage
The car drove successively 2.5x105 m, 1.4x107 mm, 8.6x107 dm, and finally 3x106 cm. What is the total mileage?
- Right triangle - leg
Calculate the nearest tenth cm leg length in the right-angled triangle with hypotenuse length 9 cm and 7 cm long leg. - Diagonal - simple
Calculate the length of the diagonal of a rectangle with dimensions 5 cm and 12 cm. - Triangle eq
Calculate accurate to hundredths cm height of an equilateral triangle with a side length 12 cm. Calculate also its perimeter and area. - Euros
Michal, Peter, John, and Lenka got together 2,400 euros. Do they share an amount in a ratio of 2:6:4:3. How many got each of them? - Divide money
Divide 1200 USD at a ratio of 1:2:3:4:5:6:9:10 - Similarity
ABC is a triangle wherein a = 4 cm, b = 6 cm, c = 8 cm. Is it similar to the triangle DEF: d = 3 cm, e = 4.5 cm, f = 6 cm? If so, determine the ratio of similarity. - Perpetrator
A perpetrator is a number that is smaller than the number 80. It is a multiple of five, and it is odd. If we add up the tens and ones of this number, we get the number 8. - Container
How many three-quarters liters jars fill 30 liter containers?
- Addends
Number 118 is divided into two addends, so the first addend is 69, greater than 75% of the second addend. - Florist
The florist has 84 red and 48 white roses. How many bouquets can he make from them if he must use all roses? - Mr. Happy
Mr. Happy planted 36.6 meters of square garden grass; It's a third of the garden, more than half of the garden. What is the square area of this garden? - Three friends
Peter is eight times older than Rado, and Rado is three times younger than Joseph. Together they have 120 years. Determine how many are each of them. - Pavilion
The rectangular pavilion with dimensions of 3.5 m and 2.75 m is to be paved with square tiles of side 25 cm, with a price of CZK 22 per 1 piece, or rectangular tiles with sides of 20 cm and 15 cm at the price of CZK 11 per 1 pc. Which solution is cheaper
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