Author: Jeff Miller

GMAT OFFICIAL GUIDE DS Solution: We are given points (-3,-3) and (1,-3), and we need to determine whether point R is equidistant from these points. Since the line segment …

GMAT OFFICIAL GUIDE DS Solution: We are given triangle ABC, with a base of AC and a height of BD. We can sketch the diagram below: We need to …

GMAT OFFICIAL GUIDE DS – Solution: Mary persuaded n friends to donate $500 each to her election campaign, and then each of these n friends persuaded n more people …

GMAT OFFICIAL GUIDE DS Solution: The easiest way to solve this problem is to set up a double set matrix.  In our matrix we have two main categories: student …

GMAT OFFICIAL GUIDE DS Solution: We are given that a group of men and woman at a company received an average score of 80 on a test. We must …

GMAT OFFICIAL GUIDE DS – Solution: Let’s begin by sketching the number line. We need to determine whether r is closest to zero. Statement One Alone:  q = -s …

GMAT OFFICIAL GUIDE DS Solution: We are given that machines K, M, and P, working simultaneously and independently at their respective constant rates, can complete a certain task in 24 minutes.  …

GMAT OFFICIAL GUIDE DS Solution: We need to determine the value of integer n. Statement One Alone:  n(n+1) = 6 Let’s solve the equation: n(n+1) = 6 n^2 + …