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Is a two-digit number XY even? (1) LCM of X and Y is even

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Is a two-digit number XY even? (1) LCM of X and Y is even [#permalink] New post 12 Oct 2006, 16:39
Is a two-digit number XY even?

(1) LCM of X and Y is even
(2) X is even
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Re: PROPERTIES OF INTIGERS [#permalink] New post 12 Oct 2006, 18:16
yezz wrote:
Is a two-digit number XY even?

(1) LCM of X and Y is even
(2) X is even


1) XY can be 32 or 23 (LCM of 3 and 2 is 6 - even) INSUFF
2) 22 or 21

1 and 2) 23 or 24 (LCM is 6 or 4 - even in both cases and X is even) INSUFF

E. ?
Re: PROPERTIES OF INTIGERS   [#permalink] 12 Oct 2006, 18:16
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Is a two-digit number XY even? (1) LCM of X and Y is even

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