A rectangular garden is to be twice as long as it is wide…
May 19, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given that a rectangular garden is twice as long as it is wide. If we let w = the width of the …
If 2^(x + y) = 4^8, what is the value of y…
May 19, 2016
GMAT OFFICIAL GUIDE DS Solution: Since we want to find the value of y, let’s isolate y in the equation: 2^(x + y) = 4^8 2^(x + y) = …
What is the ratio of the average (arithmetic mean) height…
May 19, 2016
GMAT OFFICIAL GUIDE DS Solution: We want to find the ratio of the average height of students in class X to the average height of students in class Y. …
A certain high school with a total enrollment of 900 students…
May 19, 2016
GMAT OFFICIAL GUIDE DS Solution: We want to find out the number of students who attended the science fair on all three days. Statement One Alone: Of the students …
If x = 2t and y = t/3, what is the value of x^2 – y^2
May 19, 2016
GMAT OFFICIAL GUIDE DS Solution: Since x = 2t and y = t/3, by substitution, we have x^2 – y^2 (2t)^2 – (t/3)^2 4t^2 – t^2/9 (36t^2)/9 – t^2/9 …
A store reported total sales of $385 million for February of…
May 17, 2016
GMAT OFFICIAL GUIDE PS Solution: The formula for percent increase is (New – Old)/Old x 100%. Here the “New” sales is $385 million and the “Old” sales is $320 million. …
The total cost for Company X to produce a batch of tools is $10,000 plus…
May 17, 2016
GMAT OFFICIAL GUIDE PS Solution: We know the relationship between profit, revenue and cost is: profit = revenue – cost or P = R – C (the relationship is actually …
Working simultaneously at their respective constant rates, Machines…
May 17, 2016
GMAT OFFICIAL GUIDE PS Solution: We have a combined worker problem. In such problems we use the equation: Work (1 machine) + Work (2 machine) = Total Work. We …