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Difficulty—
Does x + c = y + c ?
(1) x = y
(2) x = c
Answer: A
Source: GMATPrep test
(1) x = y
(2) x = c
Answer: A
Source: GMATPrep test
Target question: Does x + c = y + c ?BTGModeratorVI wrote: ↑Tue May 12, 2020 2:10 pmDoes x + c = y + c ?
(1) x = y
(2) x = c
Answer: A
Source: GMATPrep test
This is a good candidate for rephrasing the target question.
Take the equation x + c = y + c, and subtract c from both sides to get: x = y
REPHRASED target question: Does x = y ?
Aside: Here’s a video with tips on rephrasing the target question: https://www.gmatprepnow.com/module/gmat- ... cy?id=1100
Statement 1: x = y
Perfect!The answer to the REPHRASED target question is YES, x = y
Since we can answer the REPHRASED target question with certainty, statement 1 is SUFFICIENT
Statement 2: x = c
Since we know nothing about the value of y, we cannot answer the REPHRASED target question
Statement 2 is NOT SUFFICIENT
Answer: A
Cheers,
Brent
