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# Is x+y<1?

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Manager
Joined: 23 Sep 2009
Posts: 147

Kudos [?]: 121 [0], given: 37

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21 Sep 2010, 22:57
00:00

Difficulty:

45% (medium)

Question Stats:

54% (00:41) correct 46% (00:39) wrong based on 48 sessions

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Is x+y<1?

(1) $$x<\frac{8}{9}$$
(2) $$y<\frac{1}{8}$$
[Reveal] Spoiler: OA

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Kudos [?]: 121 [0], given: 37

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Kudos [?]: 128822 [0], given: 12183

Re: Is sum less than 1 [#permalink]

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21 Sep 2010, 23:01
Is x+y<1

(1) $$x<\frac{8}{9}=\frac{64}{72}$$. Not sufficient by itself.

(2) $$y<\frac{1}{8}=\frac{9}{72}$$. Not sufficient by itself.

(1)+(2) $$x+y<\frac{64}{72}+\frac{9}{72}=\frac{73}{72}$$ --> $$x+y<\frac{73}{72}>1$$. So $$x+y$$ may or may not be less than 1: $$x+y$$ could be less than 1 as well as more than 1, in the range $$(1,\frac{73}{72})$$ or even equal to 1. Not sufficient.

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Kudos [?]: 128822 [0], given: 12183

Manager
Joined: 23 Sep 2009
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Kudos [?]: 121 [0], given: 37

Re: Is sum less than 1 [#permalink]

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22 Sep 2010, 16:28
Bunuel wrote:
Is x+y<1

(1) $$x<\frac{8}{9}=\frac{64}{72}$$. Not sufficient by itself.

(2) $$y<\frac{1}{8}=\frac{9}{72}$$. Not sufficient by itself.

(1)+(2) $$x+y<\frac{64}{72}+\frac{9}{72}=\frac{73}{72}$$ --> $$x+y<\frac{73}{72}>1$$. So $$x+y$$ may or may not be less than 1. Not sufficient.

Thank you Bunnel...I made a silly mistake by taking x and y eqaul to the values given in the problem...I need to read the problem carefully...Thank you again
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Re: Is sum less than 1 [#permalink]

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24 Sep 2010, 20:06
Thanks Bunuel. I picked E as well.

I'd rather not see GMAT Prep questions on the forum though. Like others in verbal forum say, it might skew our score in doing the prep ourselves..

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Manager
Joined: 30 May 2010
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Re: Is sum less than 1 [#permalink]

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24 Sep 2010, 20:28
FQ wrote:
Thanks Bunuel. I picked E as well.

I'd rather not see GMAT Prep questions on the forum though. Like others in verbal forum say, it might skew our score in doing the prep ourselves..

I like them in the forum, because there is no explanations given in GMAT Prep. As long as the post is tagged, you should be able to avoid clicking and seeing GMAT Prep questions.

Kudos [?]: 244 [0], given: 32

Joined: 31 Dec 1969

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Location: Russian Federation
Concentration: Entrepreneurship, International Business
GMAT 3: 740 Q40 V50
GMAT 4: 700 Q48 V38
GMAT 5: 710 Q45 V41
GMAT 6: 680 Q47 V36
GMAT 9: 740 Q49 V42
GMAT 11: 500 Q47 V33
GMAT 14: 760 Q49 V44
WE: Supply Chain Management (Energy and Utilities)
Re: Is sum less than 1 [#permalink]

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27 Sep 2010, 14:00
Dude don't post the answer above the question in your post. Posting the answer farther down allows others to attempt to solve the question without knowing the answer beforehand.

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Senior Manager
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Location: USA
WE 1: Engineering
Re: Is sum less than 1 [#permalink]

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27 Sep 2010, 14:28
BeavisMan wrote:
Dude don't post the answer above the question in your post. Posting the answer farther down allows others to attempt to solve the question without knowing the answer beforehand.

It helps not to look down or scroll down while you are attempting to solve the question.
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Re: Is sum less than 1   [#permalink] 27 Sep 2010, 14:28
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# Is x+y<1?

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