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# If x and y are greater than 0, is x=1? 1) x/y=1 2) xy=1

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Senior Manager
Joined: 15 Feb 2011
Posts: 264
Followers: 4

Kudos [?]: 10 [0], given: 9

If x and y are greater than 0, is x=1? 1) x/y=1 2) xy=1 [#permalink]  10 Sep 2011, 03:46
00:00

Difficulty:

5% (low)

Question Stats:

55% (01:05) correct 44% (00:28) wrong based on 9 sessions
If x and y are greater than 0, is x=1?

1) x/y=1
2) xy=1
Manager
Status: Trying to survive
Joined: 29 Jun 2011
Posts: 187
GMAt Status: Quant section
Concentration: Finance, Real Estate
Schools: WBS (D)
GMAT Date: 12-30-2011
GPA: 3.2
Followers: 10

Kudos [?]: 88 [0], given: 94

Re: Gprep - NS!! [#permalink]  10 Sep 2011, 04:00
DeeptiM wrote:
If x and y are greater than 0, is x=1?

1) x/y=1
2) xy=1

ST 1
x/y=1 and this means x=y so x and y can be 1 , 2, 3 , 4 , .......
EX : 5/5=1 4/4=1 1000/1000=1
NOT sufficient

ST2
xy=1 and means x=1/y so x can be 1/5 so y = 5
EX" 1/5 * 5 = 1
also not sufficient

ST1 & ST2
x=y and xy=1
you can simply find that xx=1 this means x^2 = 1 so x= +1 or x= -1
and because y and x must be larger than 0 so x must be +1
sufficient

_________________

How can i lose my faith in life's fairness when i know that the dreams of those who sleep on the feathers are not more beautiful than the dreams of those who sleep on the ground? - Jubran Khaleel Jubran

Manager
Joined: 04 Jun 2011
Posts: 194
Followers: 0

Kudos [?]: 30 [1] , given: 21

Re: Gprep - NS!! [#permalink]  10 Sep 2011, 05:05
1
KUDOS
yup.. C.. nicely explained silver
Manager
Status: Trying to survive
Joined: 29 Jun 2011
Posts: 187
GMAt Status: Quant section
Concentration: Finance, Real Estate
Schools: WBS (D)
GMAT Date: 12-30-2011
GPA: 3.2
Followers: 10

Kudos [?]: 88 [1] , given: 94

Re: Gprep - NS!! [#permalink]  10 Sep 2011, 05:09
1
KUDOS
viks4gmat wrote:
yup.. C.. nicely explained silver

thanks
_________________

How can i lose my faith in life's fairness when i know that the dreams of those who sleep on the feathers are not more beautiful than the dreams of those who sleep on the ground? - Jubran Khaleel Jubran

Re: Gprep - NS!!   [#permalink] 10 Sep 2011, 05:09
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