Author: Scott Woodbury-Stewart

If x and y are positive integers, what is the value of… Solution: We must determine the value of √x + √y. Statement One Alone:  x + y = …

GMAT OFFICIAL GUIDE DS Solution: We are given that a and b are positive integers and we must determine: Is a/b < 9/11? or Is a/b <0.818181…? Statement One …

GMAT OFFICIAL GUIDE DS Solution: We are given that for a certain car repair, the total charge consisted of a charge for parts, a charge for labor, and a …

GMAT OFFICIAL GUIDE DS Solution: We must determine whether x = 1/y. Statement One Alone:  xy = 1 Manipulating the equation in statement one by dividing both sides by …

GMAT OFFICIAL GUIDE DS Solution: Out of three houses being sold, we must determine the asking price for the 2nd most expensive house. Let’s use variables of a, b, …

GMAT OFFICIAL GUIDE DS Solution: We are asked to determine the value of 10 percent of y. Putting “10 percent of y” into a mathematical expression we have: 0.1y= …

GMAT OFFICIAL GUIDE DS Solution: We are given that there are red, white, and blue marbles in a jar. Thus, we can create the following probability equation: P(red) + …

GMAT OFFICIAL GUIDE PS – Solution: We can begin by defining two variables: x = the number of liters of 2 percent solution y = the number of liters …