The numbers x and y are not integers. The value of x is closest to which integer?
1. 4 is the integer that is closest to x+y
2. 1 is the integer that is closest to x-y.
OA: E
Gmat Prep DS - x is closest to?
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First consider each statement individually.sarahw_gmat wrote:The numbers x and y are not integers. The value of x is closest to which integer?
1. 4 is the integer that is closest to x+y
2. 1 is the integer that is closest to x-y.
OA: E
(1) 4 is the integer that is closest to x+y implies 3.5 < x + y < 4.5. But x can be any non-integer value, so statement 1 alone is NOT SUFFICIENT.
(2) 1 is the integer that is closest to x-y implies 0.5 < x - y < 1.5. But x can be any non-integer value, so statement 2 alone is NOT SUFFICIENT.
Combining (1) and (2), we have 3.5 < x + y < 4.5 and 0.5 < x - y < 1.5, which gives 4 < 2x < 6 or 2 < x < 3
Again x can take any value between 2 and 3, so even two statements taken together are NOT sufficient.
The correct answer is E.
Last edited by Anurag@Gurome on Tue Jul 19, 2011 9:44 pm, edited 1 time in total.
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Anurag@Gurome wrote:First consider each statement individually.sarahw_gmat wrote:The numbers x and y are not integers. The value of x is closest to which integer?
1. 4 is the integer that is closest to x+y
2. 1 is the integer that is closest to x-y.
OA: E
(1) 4 is the integer that is closest to x+y implies 3.5 < x < 4.5. But x can be any non-integer value, so statement 1 alone is NOT SUFFICIENT.
(2) 1 is the integer that is closest to x-y implies 0.5 < x < 1.5. But x can be any non-integer value, so statement 2 alone is NOT SUFFICIENT.
Combining (1) and (2), we have 3.5 < x < 4.5 and 0.5 < x < 1.5, which gives 4 < 2x < 6 or 2 < x < 3
Again x can take any value between 2 and 3, so even two statements taken together are NOT sufficient.
The correct answer is E.
1) 4 is the integer that is closest to x+y implies 3.5 < x < 4.5 - How did you imply x range out of x+y range ?
(2) 1 is the integer that is closest to x-y implies 0.5 < x < 1.5- How did you imply x range out of x-y range
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That's a typo, I have edited the previous reply. Thanks for pointing that!ArpanaAmishi wrote:
1) 4 is the integer that is closest to x+y implies 3.5 < x < 4.5 - How did you imply x range out of x+y range ?
(2) 1 is the integer that is closest to x-y implies 0.5 < x < 1.5- How did you imply x range out of x-y range
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a x,y can be 0.1 and 3.8 or vice versa. not sufficient.
b x,y can be 2.2 and 1.4 or viceversa. not sufficient.
a+b
x+y <=4
x-y <=1
thus 2x <= 5 meaning x <= 2.5. hence not sufficient.
thus E it is.
b x,y can be 2.2 and 1.4 or viceversa. not sufficient.
a+b
x+y <=4
x-y <=1
thus 2x <= 5 meaning x <= 2.5. hence not sufficient.
thus E it is.
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