Sum of first n terms
Category: E Math
Painting a house
5 men are hired to paint a house. If an additional man is hired, the painting can be completed 4 days earlier. Calculate the number of additional men to be hired if the painting is to be completed 18 days earlier.
ratio m:n:p
Using (a-b)^2
Pressure inversely proportional to the volume
The pressure, P, Pa, of an object, is inversely proportional to the volume of a cube.
The pressure is 1000 Pa when the length of the cube is l cm.
Find the new pressure when the length of the cube increases by 400%.
Happiness Index Pictogram
It is not clear whether the Happiness Index of the different years is compared based on the height of the smiley faces or the area of the smiley faces.
Depending on which criteria are used to compare the happiness index of the different year, the data can have a different interpretation.
Force inversely proportional to the square of the distance
Distance between 2 points
Toothpicks Figures
s is directly proportional to the square of v
s is directly proportional to the square of v. It is known that s = 36 for a particular value of v.
Find the value of s when this value of v is halved.
