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

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Manager
Joined: 18 Jan 2007
Posts: 95

Kudos [?]: 9 [0], given: 0

When in a problem, two integers are given as x and y, [#permalink]

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25 Sep 2007, 18:59
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)?

Kudos [?]: 9 [0], given: 0

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5039

Kudos [?]: 424 [0], given: 0

Location: Singapore

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25 Sep 2007, 19:02
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.

Kudos [?]: 424 [0], given: 0

VP
Joined: 08 Jun 2005
Posts: 1144

Kudos [?]: 239 [0], given: 0

Re: X and Y, distinct integers? [#permalink]

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26 Sep 2007, 00:34
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.

Kudos [?]: 239 [0], given: 0

Re: X and Y, distinct integers?   [#permalink] 26 Sep 2007, 00:34
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