Author: Scott Woodbury-Stewart

GMAT OFFICIAL GUIDE DS Solution: We have a group of 50 people and need to determine how many of those people are doctors with a law degree. We can …

GMAT OFFICIAL GUIDE DS Solution: We are given that a is a 3-digit integer and b is a 3-digit integer and need to determine whether the product of a …

GMAT OFFICIAL GUIDE PS Solution: We can create the following equation: Total houses = number with air conditioning + number with sunporch + number with pool – number with …

Solution: We are looking for two consecutive times (when the door opened) with a gap of more than 15 minutes, since only then the light would be off. Since …

GMAT OFFICIAL GUIDE PS Solution: Let’s review two rules for the standard deviation: 1. Adding a constant to each value in a data set does not change the value …

The symbol ∆ denotes one of the four arithmetic operations… Solution: Let’s analyze the given inequality: If ∆ = addition: 6 + 3 ≤ 3 9 ≤ 3 Since …

GMAT OFFICIAL GUIDE PS Solution: We can let the number of P units sold = n and the number of Q units sold = 2n, and thus: /(n + …

GMAT OFFICIAL GUIDE PS Solution: Among all the pairs of integers that satisfy m^2 + p^2 < 100, the product mp is greatest if m and p are as …