Author: Scott Woodbury-Stewart

GMAT OFFICIAL GUIDE PS Solution: We can let c = the capacity of the tank. Since when n liters of fuel was added to a tank that was already …

GMAT OFFICIAL GUIDE DS Solution: We are given that x is a positive integer and must determine whether x is prime. Statement One Alone: 3x + 1 is prime. …

GMAT OFFICIAL GUIDE DS Solution: We are given that x is a positive integer and must determine the value of √(x+24) – √x. Statement One Alone: √x is an …

GMAT OFFICIAL GUIDE DS Solution: We are given that three dice (numbered 1 to 6) are tossed and that the sum of the three numbers facing up is 12. …

GMAT OFFICIAL GUIDE DS Solution: We are given that the sum of 4 different odd integers is 64 and need to determine the value of the greatest of these …

GMAT OFFICIAL GUIDE DS Solution: This is an overlapping set question. A great way to solve this problem is to set up a table with two main categories: experienced …

GMAT OFFICIAL GUIDE DS Solution: Let’s say Jill is applying to company A and company B. We can create the following equation: 1 = P(offer from only A) + …

GMAT OFFICIAL GUIDE DS Solution: We are given that x is a positive integer greater than 1 and need to determine the value of x. Statement One Alone: 2x …