Maths practice for 14 year olds - page 4 of 290
Number of problems found: 5799
- A box
A box contains 6 red, 5 blue, and 4 white balls. Find the probability of drawing a) a red ball and b) a non-white ball. - Two-element combinations
Write all two-element combinations from elements a, b, c, and d. - The difference
The difference between the two numbers is 1375. If their exact quotient is 12. Find the two numbers - Two numbers 7
The sum of two consecutive even numbers is 30. Find the numbers. - Blocks
There are nine interactive basic building blocks of an organization. How many two-blocks combinations are there? - Substitution
Solve equations by substitution: x+y= 11 y=5x-25 - Ratio 11
Simplify this ratio 10: 1/4 - Unknown number 23
Find 2/3 of the unknown number, which is two-thirds of the 99. - Percent to number
To increase that number by 5 percent, we need to multiply it by: - Quatrefoil
Calculate the quatrefoil area, inscribed in a square with a side of 6 cm. - Square roots
What is equal to the product of the square roots of 295936? - Thales
Calculate the length of the Thales' circle described to the right triangle with hypotenuse 44.2 cm. - Perpendicular
Find the slope of the line perpendicular to the line p: y = 8x +6. - Product
The product of two consecutive odd numbers is 8463. What are these numbers? - Teams
How many ways can we divide 16 players into two teams of 8 members? - Arrangements 63384
Determine the number of arrangements of these six elements: a, a, a, b, b, c. - Percentage 18663
Of the 1,500 light bulbs produced, 21 were defective. What percentage of light bulbs were flawless? - System: 5690
Solve the system: 2 * (x-2) = 6y + 6 y-x = -2 - Calculate 4171
Calculate the volume of a sphere with a diameter of 15 cm. - Equations: 2964
Solve a system of equations: x + y = 4 x-3y = -6
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