Author: Jeff Miller

GMAT OFFICIAL GUIDE PS Solution: This problem is best solved by setting up a diagram to represent the markings. We are given that we are marking the pipe into …

GMAT OFFICIAL GUIDE PS Solution: This is a great problem because we can solve it using equations and substitution, or we can employ some estimation because the equation we …

GMAT OFFICIAL GUIDE PS Solution: This is an overlapping set question that is testing our ability to solve for maximum and minimum values. We know this because the answer …

GMAT OFFICIAL GUIDE PS Solution: We are given the reciprocal of r is equal to the sum of the reciprocals of x and y. Thus we can say: 1/r …

GMAT OFFICIAL GUIDE PS Solution: Let’s first label the original two-digit integer as N. We can then say that N = 10A + B, where A is the tens …

GMAT OFFICIAL GUIDE PS Solution: We start with the formula for calculating the average. average = sum/quantity We are given that the initial quantity is n days and that …

GMAT OFFICIAL GUIDE PS Solution: This is an interesting question because we are immediately given the option to insert any prime number we wish for p. Since this is …

GMAT OFFICIAL GUIDE PS Solution: This problem does contain a diagram that looks like the following: We are given that the line y = x is a perpendicular bisector …