BTGModeratorVI wrote: ↑Wed Oct 07, 2020 7:22 am
Is x less than 20?
(1) The sum of x and y is less than 20.
(2) y is less than 20.
Answer:
e
Source: official guide
Target question: Is x less than 20?
When I scan the two statements, I can quickly see that neither statement alone is sufficient.
So let's jump straight to....
.
.
.
Statements 1 and 2 combined
There are several values of x and y that satisfy BOTH statements. Here are two:
Case a: x = 5 and y = 5. In this case, the answer to the target question is
YES, x is less than 20
Case b: x = 30 and y = -30. In this case, the answer to the target question is
NO, x is not less than 20
Since we cannot answer the
target question with certainty, the combined statements are NOT SUFFICIENT
Answer: E
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
