Equation - examples
Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?- Arithmetic progression
In some AP applies: 5a2 + 7a5 = 90 s3 = 12 Find the first member a =? and difference d = ? - Krkonose CZ
Tourist's rod on the tourist route in the Krkonose was 1/5 of its length into the ground. Snow fell in winter and 1/3 of the length of the rod remained above the snow. Find the height of the snow if the length of the part above the snow is 32 cm greater t - Cuboid walls
Calculate the volume of the cuboid if its different walls have area of 195cm², 135cm² and 117cm². - Hollow sphere
The volume of the hollow ball is 3432 cm3. What is its internal radius when the wall thickness is 3 cm? - Forest nursery
In the forest nursery after winter, they found that 1/10 stems died out of them. For them, they land 193 new spruces. How many spruces are in the forest nursery? - Three shapes
1/5 of a circle is shaded. The ratio of area if square to the sum of area of rectangle and that of the circle is 1:2. 60% of the square is shaded and 1/3 of the rectangle is shaded. What is the ratio of the area of circle to that of the rectangle? - Guess a fraction
Tom was asked to guess a fraction. The sum of 1/2 the numerator and 1/3 of its denominator is 30. If Tom subtracts 36 from its denominator, the fraction becomes 1/3. What is the fraction that Tom was asked to guess? (Leave your answer in simplest form) - VCP equation
Solve the following equation with variations, combinations and permutations: 4 V(2,x)-3 C(2,x+ 1) - x P(2) = 0 - Crown coins
Jana saves two-crown and five-crown coins. She has ten coins in the cashier. How many two crowns and how many five crowns shw have if she saved 29 crowns? - Trees - orchard
The 3/5 trees are apple trees and 1/3 of the trees are cherries. The remaining 5 trees are pear trees. How many trees are in the orchard. - Eq1
Solve equation: 4(a-3)=3(2a-5) - Fifth of the number
The fifth of the number is by 24 less than that number. What is the number? - Father and son
Father is 48 years old, son 23. When will be the father twice older than a son? - Nice prism
Calculate the surface of the cuboid if the sum of its edges is a + b + c = 19 cm and the body diagonal size u = 13 cm. - Grandfather
The grandfather is three years older than an grandmother. The average age of the grandmother, the grandfather and their seven grandchildren is 28 years. The grandchildren have a total of 105 years. Calculate how old is grandfather. - Chocolate
Charlie bought 7 same chocolates for 14 Eur. How many euros he pay for 27 chocolates? - Inflation
What is better for people (employees)? ? - Brick
One brick is 2 kg and half a brick heavy. What is the weight of one brick? - Proof PT
Can you easy prove Pythagoras theorem using Euclidean theorems? If so, do it. - Root
The root of the equation ? is: ?
In some AP applies: 5a2 + 7a5 = 90 s3 = 12 Find the first member a =? and difference d = ?
Tourist's rod on the tourist route in the Krkonose was 1/5 of its length into the ground. Snow fell in winter and 1/3 of the length of the rod remained above the snow. Find the height of the snow if the length of the part above the snow is 32 cm greater t
Calculate the volume of the cuboid if its different walls have area of 195cm², 135cm² and 117cm².
The volume of the hollow ball is 3432 cm3. What is its internal radius when the wall thickness is 3 cm?
In the forest nursery after winter, they found that 1/10 stems died out of them. For them, they land 193 new spruces. How many spruces are in the forest nursery?
1/5 of a circle is shaded. The ratio of area if square to the sum of area of rectangle and that of the circle is 1:2. 60% of the square is shaded and 1/3 of the rectangle is shaded. What is the ratio of the area of circle to that of the rectangle?
Tom was asked to guess a fraction. The sum of 1/2 the numerator and 1/3 of its denominator is 30. If Tom subtracts 36 from its denominator, the fraction becomes 1/3. What is the fraction that Tom was asked to guess? (Leave your answer in simplest form)
Solve the following equation with variations, combinations and permutations: 4 V(2,x)-3 C(2,x+ 1) - x P(2) = 0
Jana saves two-crown and five-crown coins. She has ten coins in the cashier. How many two crowns and how many five crowns shw have if she saved 29 crowns?
The 3/5 trees are apple trees and 1/3 of the trees are cherries. The remaining 5 trees are pear trees. How many trees are in the orchard.
Solve equation: 4(a-3)=3(2a-5)
The fifth of the number is by 24 less than that number. What is the number?
Father is 48 years old, son 23. When will be the father twice older than a son?
Calculate the surface of the cuboid if the sum of its edges is a + b + c = 19 cm and the body diagonal size u = 13 cm.
The grandfather is three years older than an grandmother. The average age of the grandmother, the grandfather and their seven grandchildren is 28 years. The grandchildren have a total of 105 years. Calculate how old is grandfather.
Charlie bought 7 same chocolates for 14 Eur. How many euros he pay for 27 chocolates?
What is better for people (employees)? ?
One brick is 2 kg and half a brick heavy. What is the weight of one brick?
Can you easy prove Pythagoras theorem using Euclidean theorems? If so, do it.
The root of the equation ? is: ?Do you have interesting mathematical example that you can't solve it? Enter it and we can try to solve it.
