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21 Jan 2020, 04:28
Kudos
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
76% (01:08) correct
24%
(01:21)
wrong
based on 181
sessions
History
Date
Time
Result
Not Attempted Yet
21 Jan 2020, 04:54
Kudos
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Bunuel
Question: Is x > y?
STatement 1: x - y - 1 > 0
i.e. x > y+1
Since x is greater than even y+1 and y+1 > y, therefore, x essentially is greater than y as well i.e. x > y
SUFFICIENT
STatement 2: x - y + 1 > 0
i.e. x > y-1
@ y = 2, x may be 1.5 as well as 2.5 hence x may be greater or smaller than y hence
NOT SUFFICIENT
Answer: Option A
18 Mar 2020, 08:36
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Bunuel
Target question: Is x > y?
Statement 1: x - y - 1 > 0
Add y and add 1 to both sides to get: x > y + 1
Since we can also say that y + 1 > y for all values of y, we can write: x > y + 1 > y
At this point, we can see that x > y
The answer to the target question is YES, x is greater than y
Since we can answer the target question with certainty, statement 1 is SUFFICIENT
Statement 2: x - y + 1 > 0
Add y to both sides to get: x + 1 > y
There are several values of x and y that satisfy the inequality x + 1 > y. Here are two:
Case a: x = 10 and y = 0. In this case, the answer to the target question is YES, x is greater than y
Case b: x = 0.5 and y = 1. In this case, the answer to the target question is NO, x is not greater than y
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT
Answer: A
Cheers,
Brent
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