Author: Jeff Miller

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 …

GMAT OFFICIAL GUIDE PS Solution: The first thing we want to do is set up the ratio of the original solution using variable multipliers. soap : alcohol : water …

GMAT OFFICIAL GUIDE PS Solution: This problem is testing our knowledge of the multiplication rules for positive and negative numbers. Remember that when we multiply an even number of …

GMAT OFFICIAL GUIDE PS Solution: We start by creating a variable for the total number of students in the math course. We can say: T = Total number of …

GMAT OFFICIAL GUIDE PS Solution: To solve, we first isolate the x^2 in the inequality 1 – x^2 ≥ 0. So we have: 1 ≥ x^2 Next, we take …