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Is the product xy > 27?

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Math Expert
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V
Joined: 02 Sep 2009
Posts: 54440
Is the product xy > 27?  [#permalink]

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New post 24 Jan 2016, 05:34
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

61% (00:59) correct 39% (01:03) wrong based on 60 sessions

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Intern
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Joined: 17 Jan 2016
Posts: 3
Re: Is the product xy > 27?  [#permalink]

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New post 24 Jan 2016, 20:51
The Answer should be E.

Neither clue is enough on its own. Simple counter example to use would be 0.0001 and 100 as the other variable
Even with both statements combined, we can still find conflicting examples, such as
x= 3, y = 5, xy < 27
x= 4.9, y = 5.9 , xy = 27.84 > 27

Hence still insufficient
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Concentration: Entrepreneurship, Technology
GMAT 1: 730 Q50 V38
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Re: Is the product xy > 27?  [#permalink]

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New post 07 Sep 2017, 01:00
Is the product xy > 27?

(1) 2 < x < 5
Clearly insufficient as we don't know y
(2) 6 > y
Clearly insufficient as we don't know x

1+2

max of x and y in integer form x=4 y=5 xy=20 <27
Here we can make mistake if we consider both x and y integers. Nowhere its mentioned that x and y are integers.

So max of x and y approx we can check for y=5.9 and x=4.9
xy=5.9*4.9 = 28.91 >27

Getting different answer in 2 cases

So not sufficient

Answer: E
GMAT Club Bot
Re: Is the product xy > 27?   [#permalink] 07 Sep 2017, 01:00
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Is the product xy > 27?

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