Hello,
Can you please assist with this:
If x and y are integers and xy = 4, what is the value of y?
(1) x = y - 3
(2) x = 1
OA: B
However, I am getting D
xy = 4
=> 1.4 = 4
or 2.2 = 4
or 4.1 = 4
1) x = y - 3 => x + 3 = y
Hence, x = 1. So y = 4
Hence, suff.
2) x = 1
Suff.
Hence, D
Thanks,
Sri
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If x and y are integers and xy = 4, what is the value of y?
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gmattesttaker2
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GMATGuruNY
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Given that x and y are integers and that xy=4, the following cases are possible:gmattesttaker2 wrote:Hello,
Can you please assist with this:
If x and y are integers and xy = 4, what is the value of y?
(1) x = y - 3
(2) x = 1
x=1, y=4
x=-1, y=-4
x=2, y=2
x=-2, y=-2
x=4, y=1
x=-4, y=-1.
Statement 1: x = y-3
In other words, x is 3 less than y.
Of the six cases listed above, two are such that x is 3 less than y:
x=1, y=4
x=-4, y=-1.
Since it's possible that y=4 or that y=-1, INSUFFICIENT.
Statement 2: x=1
Of the six cases listed above, only one includes x=1:
x=1, y=4.
Thus, y=4.
SUFFICIENT.
The correct answer is B.
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Brent@GMATPrepNow
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Hey Sri,gmattesttaker2 wrote:Hello,
Can you please assist with this:
If x and y are integers and xy = 4, what is the value of y?
(1) x = y - 3
(2) x = 1
OA: B
However, I am getting D
xy = 4
=> 1.4 = 4
or 2.2 = 4
or 4.1 = 4
1) x = y - 3 => x + 3 = y
Hence, x = 1. So y = 4
Hence, suff.
2) x = 1
Suff.
Hence, D
Thanks,
Sri
I think you read the question as "If x and y are positive integers . . .," in which case the answer would, indeed, be D
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
