Author: Jeff Miller

GMAT OFFICIAL GUIDE DS Solution: We need to determine whether i + j is an even integer. Remember: even + even = even odd + odd = even Thus, …

GMAT OFFICIAL GUIDE DS We are given that water is flowing into a tank through an inlet pipe and out of the tank through an outlet pipe. We need …

GMAT OFFICIAL GUIDE DS Solution: We are given that Pat saved $600 worth of his earnings, and we need to determine how much he earned last month. Statement One …

GMAT OFFICIAL GUIDE DS Solution: We need to determine which investment, J or K, provides a greater annual rate of return. That is, we are being asked whether J’s …

GMAT OFFICIAL GUIDE DS Solution: We need to determine whether n + 1 is odd. Remember, if n is even, then n + 1 will be odd, and if …

GMAT OFFICIAL GUIDE DS Solution: Let’s first put the given information into a diagram. We can also define variables for the distances between J and K, K and L, …

GMAT OFFICIAL GUIDE DS Solution: Let’s sketch a diagram of the stairs. Keep in mind that we don’t know the number of stairs between the floors, but the problem …

GMAT OFFICIAL GUIDE DS Solution: An easy way to solve the problem is to set up a double set matrix. In our matrix we’ll have two main categories: gender …