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When in a problem, two integers are given as x and y,

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Manager
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Joined: 18 Jan 2007
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Kudos [?]: 7 [0], given: 0

When in a problem, two integers are given as x and y, [#permalink] New post 25 Sep 2007, 17:59
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

When in a problem, two integers are given as x and y, persay, can we assume they are of different value?

Reason being, I thought I always could. Then I ran into a challenge problem, where you cant make this assumption:

X and Y are prime integers. What is absvalue (x - y)?
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Joined: 07 Jul 2004
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Kudos [?]: 236 [0], given: 0

 [#permalink] New post 25 Sep 2007, 18:02
If they are the same prime, |(x-y)| = 0
If they are different primes |(x-y)| could take on different values depending on x and y.
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Re: X and Y, distinct integers? [#permalink] New post 25 Sep 2007, 23:34
dr908 wrote:
When in a problem, two integers are given as x and y, persay, can we assume they are of different value?

Reason being, I thought I always could. Then I ran into a challenge problem, where you cant make this assumption:

X and Y are prime integers. What is absvalue (x - y)?


You cannot make the assumption that X and Y are different integers. So X-Y can equal zero.

:)
Re: X and Y, distinct integers?   [#permalink] 25 Sep 2007, 23:34
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When in a problem, two integers are given as x and y,

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