Bunuel wrote:
The Official Guide for GMAT® Review, 13th Edition - Quantitative Questions ProjectA certain expressway has Exits J, K, L, and M, in that order. What is the road distance from Exit K to Exit L ?
(1) The road distance from Exit J to Exit L is 21 kilometers.
(2) The road distance from Exit K to Exit M is 26 kilometers.
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, and L and M.
Distance from J to K = x
Distance from K to L = y
Distance from L to M = z
We are asked to determine the road distance from Exit K to Exit L. Thus, we need to determine the value of y.
Statement One Alone:The road distance from Exit J to Exit L is 21 kilometers.
Statement one tells us that x + y = 21.
This is not enough information to answer the question. Statement one alone is not sufficient. Eliminate answer choices A and D.
Statement Two Alone:The road distance from Exit K to Exit M is 26 kilometers.
Statement two tells us that y + z = 26.
This is not enough information to answer the question. Statement two alone is not sufficient. Eliminate answer choice B.
Statements One and Two Together:From statements one and two we know the following:
x + y = 21 and y + z = 26
Since this is not enough to determine the value of y, we cannot answer the question.
Answer: E
_________________
See why Target Test Prep is the top rated GMAT course on GMAT Club.
Read Our Reviews