Author: Scott Woodbury-Stewart

GMAT OFFICIAL GUIDE DS Solution: We can begin by substituting p and r in for x and y, respectively, in the 3 given equations. 1) r = ap – …

GMAT OFFICIAL GUIDE DS Solution: We are given that Joan accurately divided her estimated distance by her estimated average speed to obtain an estimate for the time, in hours, …

GMAT OFFICIAL GUIDE DS Solution: We are given a diagram of an L-shaped garden. Let’s sketch that diagram below. We see that the L-shaped garden can be broken up …

GMAT OFFICIAL GUIDE DS Solution: We are given that Marta averaged x miles per hour for 2 hours and y miles per hour for the remaining 3 hours. Since …

GMAT OFFICIAL GUIDE DS Solution: We must determine whether the price of 3 shirts exceeded $60. Statement One Alone:  The price of the most expensive of the shirts exceeded …

GMAT OFFICIAL GUIDE DS Solution: We are given line l and are told that two points, N and Q, are to the right of point M.  We must determine …

GMAT OFFICIAL GUIDE DS Solution: We must determine whether the coat or the sweater was discounted by a greater amount. Statement One Alone:  The percent discount on the coat …

GMAT OFFICIAL GUIDE DS Solution: We are given that the balance in a checking account increased from May 1 to May 30. We must determine the balance of the …