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# If X is an integer, is X even? 1) aX is even, where a is an

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Manager
Joined: 19 Aug 2006
Posts: 222
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Kudos [?]: 12 [0], given: 0

If X is an integer, is X even? 1) aX is even, where a is an [#permalink]  19 Jan 2007, 06:43
If X is an integer, is X even?

1) aX is even, where a is an integer.
2) sq(X)-1 is an odd integer.

this one is very easy. But stuck in a basic concept,

are -2,-4 even integers?
Manager
Joined: 27 Jul 2006
Posts: 161
Followers: 1

Kudos [?]: 7 [0], given: 0

From what I understand, yes they are.
SVP
Joined: 05 Jul 2006
Posts: 1519
Followers: 5

Kudos [?]: 115 [0], given: 39

If X is an integer, is X even?

1) aX is even, where a is an integer.
2) sq(X)-1 is an odd integer.

this one is very easy. But stuck in a basic concept

from one a or x is even ............insuff

from two

sq x is even intiger thus x is a perfect square even intiger,,,,,,,,,,,suff

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