Is x > y ?
(1) x = y - 1
(2) x/3 = y - 5
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Hi shibsriz,
This is a fairly straight-forward DS question. Let's use TEST IT and some Number Property rules to beat it:
The prompt asks "Is x > y ?" This is a YES/NO question; we know NOTHING about the 2 variables.
Fact 1 tells us that x = y -1
so.... x + 1 = y This means that y is ALWAYS greater than x (by 1).
Is x > y? No, it NEVER IS. The answer is ALWAYS NO. This is consistent, which means....
Fact 1 SUFFICIENT.
Fact 2 tells us x/3 = y -5
If x = 3, then y = 6 Is x > y? NO.
If x = 9, then y = 8 Is x > y? YES.
This is inconsistent, which means....
Fact 2 is INSUFFICIENT.
Final Answer: A (1 only is Sufficient)
GMAT assassins aren't born, they're made,
Rich
This is a fairly straight-forward DS question. Let's use TEST IT and some Number Property rules to beat it:
The prompt asks "Is x > y ?" This is a YES/NO question; we know NOTHING about the 2 variables.
Fact 1 tells us that x = y -1
so.... x + 1 = y This means that y is ALWAYS greater than x (by 1).
Is x > y? No, it NEVER IS. The answer is ALWAYS NO. This is consistent, which means....
Fact 1 SUFFICIENT.
Fact 2 tells us x/3 = y -5
If x = 3, then y = 6 Is x > y? NO.
If x = 9, then y = 8 Is x > y? YES.
This is inconsistent, which means....
Fact 2 is INSUFFICIENT.
Final Answer: A (1 only is Sufficient)
GMAT assassins aren't born, they're made,
Rich
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Jim@StratusPrep
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Testing numbers is always a solid way to go if you are unsure. Many people say they have difficulty picking "good numbers" and that is why they don't. The only way to get better is to practice.
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