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# If k, m, and p are integers, is k m p odd? (1) k and m are

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Manager
Joined: 03 Oct 2008
Posts: 61
If k, m, and p are integers, is k m p odd? (1) k and m are [#permalink]

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07 Oct 2008, 07:06
If k, m, and p are integers, is k – m – p odd?
(1) k and m are even and p is odd.
(2) k, m, and p are consecutive integers.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
D. EACH statement ALONE is sufficient.
E. Statements (1) and (2) TOGETHER are NOT sufficient.

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07 Oct 2008, 10:10
[quote="albany09"]If k, m, and p are integers, is k – m – p odd?
(1) k and m are even and p is odd.
(2) k, m, and p are consecutive integers.

even - even - odd = odd

from 2

any 3 consecutive intigers ( even , odd , even) or ( odd, even , odd)

answer is odd or 0 , ie: 11 - 10 - 1 = 0

Senior Manager
Joined: 29 Mar 2008
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07 Oct 2008, 14:23
Agree with yezz.
(1) E-E-O = O (Suff)
(2) We need to know wheather one of the integers is odd or even. If k is odd, result is even, if k is even, result is odd- Insuff

Hence (A)
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Senior Manager
Joined: 21 Apr 2008
Posts: 477
Schools: Kellogg, MIT, Michigan, Berkeley, Marshall, Mellon

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08 Oct 2008, 06:31
My two cents:

1 suff. (agree with you) answer: yes, its odd

2
even-odd-even=even
example: 10-9-8=-6

odd-even-odd=even
example: 11-10-9=-8

Therefore, suff. But the answer it's not odd

where is my mistake?

OA?

Cheers
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Manager
Joined: 15 Apr 2008
Posts: 159

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08 Oct 2008, 06:44

statement 1: by picking numbers you can see that even - even-odd=odd. Hence sufficient
statement 2: consecutive integers can be odd- even- odd (in which case the answer will be even) or even- odd- even (in which case the answer will be odd). hence insufficient.
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08 Oct 2008, 06:52
JohnLewis1980 wrote:
My two cents:

1 suff. (agree with you) answer: yes, its odd

2
even-odd-even=even
example: 10-9-8=-6

odd-even-odd=even
example: 11-10-9=-8

Therefore, suff. But the answer it's not odd

where is my mistake?

OA?

Cheers

aagh!

I see my error (thanks ALD):

2 not suff.

2
even-odd-even=odd
example: 10-9-8=-7

odd-even-odd=even
example: 11-10-9=-8

Therefore A

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If you would like to discuss this question please re-post it in the respective forum. Thank you!

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_________________

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I'm not linked to GMAT questions anymore, so, if you need something, please PM me

I'm already focused on my application package

My experience in my second attempt
http://gmatclub.com/forum/p544312#p544312
My experience in my third attempt
http://gmatclub.com/forum/630-q-47-v-28-engineer-non-native-speaker-my-experience-78215.html#p588275

Re: math---odd number   [#permalink] 08 Oct 2008, 06:52
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# If k, m, and p are integers, is k m p odd? (1) k and m are

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