Maths practice for 14 year olds - page 296 of 382
Number of problems found: 7626
- Exponent equation
Which number is hidden behind x: 2 · x = 160.5 - Geometric progression
Determine the quotient and the second GP member if a3 = -5, a2 + a3 = -7 - Prism bases
Volume perpendicular quadrilateral prism is 360 cm³. The edges of the base and height of the prism are in the ratio 5:4:2. Find the area of the base and walls of the prism. - Poster rental
The poster area consists of a mantle with a diameter of 80 cm and a 1 m. The tenant pays CZK 20 per day for 1 square meter of space. How much does it cost to rent the whole area for July? - Cube surfaces ratio
The volumes of the two cubes are in the ratio of 27:8. What is the ratio of the surfaces of these cubes? - Stolen amounts
X + Y = 31835 X is the amount stolen by 1,2 and 3 Y is the amount stolen by 4 and 5 1. stole half of X, 2. half the rest and 3 more on top of that 3. stole 6801.5 4. He stole 1/9 of Y, which is 513 5. He stole the rest - Money
Peter has 2x more money than Michael. However, if Peter gave Michael € 16, Michael would have 3.5 times more money than Peter. Find how much money was initially sent from Peter and how much Michael. - Number calculation
Determine x if 52% of x equals 9.1 * 6. - Walnuts
x walnuts were in the mission. Dano took 1/4 of the nuts, Michael took 1/8 of the rest, and John took 34 nuts. It stayed here 29 nuts. Determine the original number of nuts. - Equation with abs
Solve this equation with absolute value member: |3(3x-1)|=8 - Cone mass
The teacher brought to class two wooden models of cones, which were made of the same type of wood. The first model weighed 800 g. The other had twice the base radius but half the height. Determine the mass of the second cone in grams. - Sides ratio
Calculate the circumference of a triangle with an area of 84 cm² if a:b:c = 10:17:21 - Work time
Milos would do the work himself in 5 hours. How much would it take Dan to do the job together in two hours? - Number value
25% of the number x equals 2-1. What is the value of x? - Rectangle perimeter
Determine the perimeter of the rectangle if its length and width are 2:1 and the area is 98 cm². - The rectangle The length and width of a rectangle are in the ratio of 5:2. Its length is 7.5 cm longer than its width. Find the area of the rectangle. Determine also its length and its width.
- Unknown amount of money
Damian and Denis split an unknown amount in the ratio of 5:4. Damian got six euros more than Denis. Calculate an unknown amount. Determine how much money Damian got and how much Denis got. - Unknown number x
5% from an unknown number equals the number 26. What is the unknown number? - Shots
Determine the percentage rate of keeper interventions if 32 shots don't catch four shots. - Vegan shop
The shops brought 23.2 kg of goods, fruits, vegetables, and nuts. The fruit was 4.7 kg more than vegetables, and the nuts were 1.5 kilograms less than the fruit. Determine the number of fruits, vegetables, and nuts.
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