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# ds

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Senior Manager
Joined: 02 Feb 2004
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ds [#permalink]  23 Mar 2005, 05:54
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
easy one;)
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VP
Joined: 30 Sep 2004
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Location: Germany
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D)

1) there must be at least on multiple of 3 in x => square of x squares the multiple of 3 => suff

2) there must be at least one multiple of 9 in x or in y or at least one multiple of 3 in y and in x => suff
Senior Manager
Joined: 19 Feb 2005
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Location: Milan Italy
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yeah yeah I like this question
agree on D
Senior Manager
Joined: 15 Mar 2005
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(D)

Statement 1:

x is divisible by 3. Therefore x^2 is divisible by 9. Therefore x^2 * <something> is also divisible by 9.

Statement 2:

x*y is divisible by 9. Therefore x^2 * y^2 is divisible by 9 too. Therefore x^2 * y^2 * <something> is divisible by 9 too.
_________________

Who says elephants can't dance?

Director
Joined: 21 Sep 2004
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D it is..
Senior Manager
Joined: 02 Feb 2004
Posts: 345
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Kudos [?]: 26 [0], given: 0

Sorry guys. Ans is E. Coz X^2Y^4 could be 1 and not divisible by 9 when x=81, & Y= 1/9
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