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Does xy = 1? (1) x > y (2) x = 1/y

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Intern
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Status: Applying 2018
Joined: 15 Jul 2015
Posts: 9
Location: United States
GPA: 3.3
WE: Corporate Finance (Law)
Does xy = 1? (1) x > y (2) x = 1/y  [#permalink]

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New post Updated on: 19 Feb 2018, 20:03
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

91% (00:40) correct 9% (01:20) wrong based on 51 sessions

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Does xy = 1?

(1) x > y

(2) x = 1/y

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Originally posted by michaelpalomares00 on 19 Feb 2018, 17:59.
Last edited by Bunuel on 19 Feb 2018, 20:03, edited 2 times in total.
Renamed the topic, edited the question and tags.
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Re: Does xy = 1? (1) x > y (2) x = 1/y  [#permalink]

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New post 19 Feb 2018, 19:02
michaelpalomares00 wrote:
I was unable to find this one. Can anyone explain, thanks!


I think the answer should be B, i.e. Statement (2) ALONE is sufficient.

Statement 1 - x>y, no any other details therefore NOT SUFFICIENT.
Statement 2 - x=(1/y), on simply putting the value of x in the question it will cancel out "y" and the answer will be 1. Therefore SUFFICIENT.

Hope I answered your question!
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Re: Does xy = 1? (1) x > y (2) x = 1/y  [#permalink]

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New post 19 Feb 2018, 19:04
michaelpalomares00 wrote:
I was unable to find this one. Can anyone explain, thanks!



hi..
xy=1?

1) x>y
x=2 and y = \(\frac{1}{2}\) ans is YES
x =2 and y =1 , ans is NO
insuff

2) x=1/y
so y is RECIPROCAL of x ..
product of a number and its reciprocal is always 1...
substitute x = 1/y in xy so \(xy = \frac{1}{y}*y=1\)

B
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1) Absolute modulus : http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
2)Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html
3) effects of arithmetic operations : https://gmatclub.com/forum/effects-of-arithmetic-operations-on-fractions-269413.html


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Re: Does xy = 1? (1) x > y (2) x = 1/y &nbs [#permalink] 19 Feb 2018, 19:04
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