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If x and y are integers and x < y, what is the value of x

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Manager
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If x and y are integers and x < y, what is the value of x [#permalink] New post 26 Apr 2010, 20:54
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If x and y are integers and x < y, what is the value of x + y?

(1) x^y = 4

(2) |x| = |y|




Edited for typo

Last edited by sh00nya on 26 Apr 2010, 21:57, edited 1 time in total.
Manager
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Re: [DS] Value of X+Y [#permalink] New post 26 Apr 2010, 21:47
sh00nya wrote:
If x and y are integers and x < y, what is the value of x + y?

(1) xy = 4

(2) |x| = |y|



1) Possible solutions: (x,y) - (1,4), (-4,-1)

x+y = -5 or 5

INS.

2) x = -y

x + (-x) = 0

SUFF.

B
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Re: [DS] Value of X+Y [#permalink] New post 26 Apr 2010, 21:58
Apologies

the statement 1 was incorrectly put as xy=4 it should be read as x^y

Span could you give it another try
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Re: [DS] Value of X+Y [#permalink] New post 26 Apr 2010, 23:31
Answer A

if X and Y are both integers and X < Y

USING 1)
x pow y = 4
is only possible when x = -2 and y = 2
sufficient

USING 2)
[X] = [Y]
insufficient
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Re: [DS] Value of X+Y [#permalink] New post 27 Apr 2010, 00:28
1
This post received
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sh00nya wrote:
If x and y are integers and x < y, what is the value of x + y?

(1) x^y = 4

(2) |x| = |y|




Edited for typo


Answer D

if X and Y are both integers and X < Y

USING 1)
x pow y = 4
is only possible when x = -2 and y = 2
sufficient

USING 2)
[X] = [Y] and x < y, this can only happen if X and Y are on opposite side Zero. For example Y=5, and X=-5
sufficient
X+y =0
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Re: [DS] Value of X+Y [#permalink] New post 28 Apr 2010, 01:17
Agreed, it should be D
Re: [DS] Value of X+Y   [#permalink] 28 Apr 2010, 01:17
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