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# gmatprep ds integ

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VP
Joined: 22 Nov 2007
Posts: 1078

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gmatprep ds integ [#permalink]

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09 Mar 2008, 22:31
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If x, y and z are positive integers, what is the value of x + y + z ?

(1) xyz = 70
(2) x/yz = 7/10

Kudos [?]: 687 [0], given: 0

SVP
Joined: 29 Aug 2007
Posts: 2471

Kudos [?]: 856 [0], given: 19

Re: gmatprep ds integ [#permalink]

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09 Mar 2008, 23:20
marcodonzelli wrote:
If x, y and z are positive integers, what is the value of x + y + z ?

(1) xyz = 70
(2) x/yz = 7/10

1: if xyz = 70, x, y and z could be 1, 1, and 70 or 2, 5, and 7 or 1, 2, 35. nsf..

2. x/yz = 7/10
x could be a multiple of 7 and yz could be a multiple of (1x10 or 2x5). so nsf.

togather: also nsf as xyz is 70, which repeats st. 1.
so E.
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Re: gmatprep ds integ   [#permalink] 09 Mar 2008, 23:20
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# gmatprep ds integ

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