Author: Scott Woodbury-Stewart

GMAT OFFICIAL GUIDE PS – Solution: To determine which answer choice MUST be divisible by 3 we need to determine answer choice(s) in which there is at least one …

GMAT OFFICIAL GUIDE PS Solution: This problem is what we would call a combined worker problem, where Work (of machine 1) + Work (of machine 2) = Total Work …

GMAT OFFICIAL GUIDE PS Solution: We are given that Bob plans to run south along the river, turn around, and return to where he started. We can draw this …

GMAT OFFICIAL GUIDE PS Solution: We are given that n = 20! + 17 and need to know whether n is divisible by 15, 17, and/or 19. To determine …

GMAT OFFICIAL GUIDE PS Solution: To more easily solve this problem we can inscribe triangle ABC in a circle. Remember that a circle has a total of 360 degrees. …

GMAT OFFICIAL GUIDE PS Solution: Although this problem may seem wordy it is actually a pretty basic word problem. We are asked to determine the number of stocks that …

GMAT OFFICIAL GUIDE PS Solution: Because the circle passes through point (5,0) and has center (2,-3), we know that the distance between these points is the radius of the …

GMAT OFFICIAL GUIDE PS Solution: When we have an evenly spaced set of numbers, the mean and the median are equal. Recall that an evenly spaced set of numbers …