If x, y, z are integers greater than 1, what is the value of : DS Archive
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# If x, y, z are integers greater than 1, what is the value of

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SVP
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If x, y, z are integers greater than 1, what is the value of [#permalink]

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03 Oct 2008, 15:21
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If x, y, z are integers greater than 1, what is the value of x+y+z?

(1) xyz = 70

(2) x/(yz) = 7/10
Manager
Joined: 22 Sep 2008
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Re: DS: What is the value of x+y+z? [#permalink]

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03 Oct 2008, 18:03
70= 2 * 5 *7 .... there is no other possible combination for integer value.

so xyz = 2*5*7

x+y+z =.14

A is suff.

B isnot suff.

7/10 , 14,20.21/30............all gives us ratio of 7/10..

Thanks
SVP
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Re: DS: What is the value of x+y+z? [#permalink]

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04 Oct 2008, 01:40
tarek99 wrote:
If x, y, z are integers greater than 1, what is the value of x+y+z?

(1) xyz = 70

(2) x/(yz) = 7/10

from 1

70 = 7*5*2 ...............suff

from 2

x/yz = 7/10

10x = 7yz......

yz has to be a multiple of 10 and x is a multiple of 7

thus yz could be 20 and thus x = 14

or yz = 10 thus x = 7 ...........insuff

VP
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Re: DS: What is the value of x+y+z? [#permalink]

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04 Oct 2008, 03:39
Even I go for A. Whats the OA ? Can you please tell me the source Tarek ?? . I need more such problems urgently, my exam is approaching in less than 2 weeks.
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SVP
Joined: 21 Jul 2006
Posts: 1538
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Kudos [?]: 742 [0], given: 1

Re: DS: What is the value of x+y+z? [#permalink]

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04 Oct 2008, 05:44
OA is A. The source of this question is the GMATprep.
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Re: DS: What is the value of x+y+z? [#permalink]

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04 Oct 2008, 09:33
statement (1) sufficient

70 = 2*5*7

Re: DS: What is the value of x+y+z?   [#permalink] 04 Oct 2008, 09:33
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