Author: Scott Woodbury-Stewart

GMAT OFFICIAL GUIDE PS Solution: We begin by creating a right triangle with the x-axis, the radius of circle C to the x-axis and the line segment from center …

GMAT OFFICIAL GUIDE PS Solution: We start by defining the equation of line l using the slope-intercept form of a line (y = mx + b), where m = …

GMAT OFFICIAL GUIDE PS Solution: Let’s start by substituting 1/x for x. This gives us: Even though our answer does not match any of the answer choices, it is …

GMAT OFFICIAL GUIDE PS Solution: We can classify this problem as a “catch up and pass” rate question. This means that one car is catching up to the other …

GMAT OFFICIAL GUIDE PS Solution: We are first given that John worked for 10 hours and that Mary worked for 2 hours less than John. So we can say: …

GMAT OFFICIAL GUIDE PS Solution: We can start by creating some variables. Q = quantity of towels sold P = price per towel sold Next we can set up …

GMAT OFFICIAL GUIDE PS Solution: For this overlapping sets problem we can use the following equation: Total percent = % in category A + % in category B – …

GMAT OFFICIAL GUIDE PS Solution: When first looking at this problem, we must consider the fact that 0.99999999/1.0001 and 0.99999991/1.0003 are both pretty nasty-looking fractions. However, this is a …