Tag: data sufficiency

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: We must determine whether rw = 0. The zero product property states that, in order for the product of r and w to equal …

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 need to determine the range of selling prices of 30 wallets. Recall that the range of a set of numbers is the difference …

GMAT OFFICIAL GUIDE DS Solution: We are given that sequence S has 120 terms and we must determine the 105th term of S. Statement One Alone:  The first term …

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 DS Solution: We are given that in triangle ABC, point X is the midpoint of side AC, point Y is the midpoint of side BC, point …