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# If x = 0. rstu, where r, s, t, and u each represent a

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Senior Manager
Joined: 12 Oct 2008
Posts: 491
If x = 0. rstu, where r, s, t, and u each represent a [#permalink]

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10 May 2009, 15:59
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If x = 0. rstu, where r, s, t, and u each represent a nonzero digit of x, what is the value of x?
(1) r = 3s = 2t = 6u
(2) The product of r and u is equal to the product of s and t.

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SVP
Joined: 07 Nov 2007
Posts: 1738
Location: New York

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10 May 2009, 16:17
If x = 0. rstu, where r, s, t, and u each represent a nonzero digit of x, what is the value of x?
(1) r = 3s = 2t = 6u
(2) The product of r and u is equal to the product of s and t.

r,s,t,u VALUES must be in the range.. 1 to 9

(i)
r=6u... u must be 1 becuase if u=2 r value is >9

u=1 r=6 s =2 2=3

sufficient
(2)

ru=st

r=4 and u=2 s=1 t=8
r=2 and u=8 s=8 t=1

multiple solutions.

not sufficient

A
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Senior Manager
Joined: 12 Oct 2008
Posts: 491

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10 May 2009, 16:36
How A? it is not given what is the place of r,s,t and u??????

It can be 0.1236, 0.2316 so on...
x2suresh wrote:
If x = 0. rstu, where r, s, t, and u each represent a nonzero digit of x, what is the value of x?
(1) r = 3s = 2t = 6u
(2) The product of r and u is equal to the product of s and t.

r,s,t,u VALUES must be in the range.. 1 to 9

(i)
r=6u... u must be 1 becuase if u=2 r value is >9

u=1 r=6 s =2 2=3

sufficient
(2)

ru=st

r=4 and u=2 s=1 t=8
r=2 and u=8 s=8 t=1

multiple solutions.

not sufficient

A
SVP
Joined: 07 Nov 2007
Posts: 1738
Location: New York

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10 May 2009, 20:11
How A? it is not given what is the place of r,s,t and u??????

It can be 0.1236, 0.2316 so on...
x2suresh wrote:
If x = 0. rstu, where r, s, t, and u each represent a nonzero digit of x, what is the value of x?
(1) r = 3s = 2t = 6u
(2) The product of r and u is equal to the product of s and t.

r,s,t,u VALUES must be in the range.. 1 to 9

(i)
r=6u... u must be 1 becuase if u=2 r value is >9

u=1 r=6 s =2 t=3

sufficient
(2)

ru=st

r=4 and u=2 s=1 t=8
r=2 and u=8 s=8 t=1

multiple solutions.

not sufficient

A

0.1236 ,0.2316
are not possible solutions

they don't satisfy the following equations.
r = 3s = 2t = 6u

only one solution possible... and that is 0.6231

Let me know any solution other than "0.6231" and satisfies above equation.
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Senior Manager
Joined: 08 Jan 2009
Posts: 310

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10 May 2009, 20:13
Same working . Got A.

It is given x = 0.rstu so x can be only equal to x =.6231.
Senior Manager
Joined: 12 Oct 2008
Posts: 491

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12 May 2009, 16:17
thx Suresh....OA A
Director
Joined: 23 May 2008
Posts: 743

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12 May 2009, 22:46
got A

only possible soln is let r=6

x=0.6231

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: DS: X=0   [#permalink] 12 May 2009, 22:46
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