After running 3,000 meters on a circular path, a runner is at her starting point. The radius of the circular path could be which of the following?
I. 1,500/ pi
II. 750 / pi
III. 250/ pi
Is the trick she could be anywhere on her circular path?
Strictly speaking, the path could be ANY size because the problem doesn't state that the runner is runner only in one direction (clockwise or counterclockwise). HOWEVER, assuming that the runner IS traveling one way only, the "trick" is picking those radii which would yield a circumference that is exactly divisible into 3000 so that the runner could end up back at the starting point.
In either case, it looks like all of them would work.
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993