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Q NO 266 OFFICIAL GUIDE 2017

Post your questions about customer service issues, GMAT exam policies, and GMAT exam structure. Get an official answer from GMAC, the organization behind the GMAT test!
Expert replies
by [email protected] » Sun Feb 19, 2017 8:12 am
IN THE QUESTION(ATTACHED HEREWITH), I THINK THE ANSWER SHOULD BE E. THEY HAVE SEEMED TO HAVE OVERLOOKED THE POSSIBILITY OF "ZERO" WHICH ALSO SATISFIES BOTH THE STATEMENTS 1 & 2 AND ZERO IS NOT EVEN. HENCE BOTH STATEMENTS ARE INSUFFICIENT.
PLEASE CLARIFY
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Source: — Ask the Test Maker |

by DavidG@VeritasPrep » Sun Feb 19, 2017 10:04 am
[email protected] wrote:IN THE QUESTION(ATTACHED HEREWITH), I THINK THE ANSWER SHOULD BE E. THEY HAVE SEEMED TO HAVE OVERLOOKED THE POSSIBILITY OF "ZERO" WHICH ALSO SATISFIES BOTH THE STATEMENTS 1 & 2 AND ZERO IS NOT EVEN. HENCE BOTH STATEMENTS ARE INSUFFICIENT.
PLEASE CLARIFY
Though zero is neither positive nor negative, zero is even - important number property to file away!
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by DavidG@VeritasPrep » Sun Feb 19, 2017 11:04 am
[email protected] wrote:IN THE QUESTION(ATTACHED HEREWITH), I THINK THE ANSWER SHOULD BE E. THEY HAVE SEEMED TO HAVE OVERLOOKED THE POSSIBILITY OF "ZERO" WHICH ALSO SATISFIES BOTH THE STATEMENTS 1 & 2 AND ZERO IS NOT EVEN. HENCE BOTH STATEMENTS ARE INSUFFICIENT.
PLEASE CLARIFY
And if you're curious, you can think of the definition of an even number as any 'n' that satisfies n = 2k, where k is an integer. If k = 0, then n = 0, and thus 0 is even.
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by [email protected] » Sun Feb 19, 2017 8:21 pm
Hi googly76,

Another way to think of all of this is to consider a Number Line. The integers on a Number Line always alternate... odd, even, odd, even, etc.

For example:
-3 = odd
-2 = even
-1 = odd
0 = even
1 = odd
2 = even
Etc.

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