BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Manhattan_ Is the postive integer x odd

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Data Sufficiency |
User avatar
Legendary Member
Posts: 682
Joined: Fri Jan 16, 2009 2:40 am
Thanked: 32 times
Followed by:1 members

Re: Manhattan_ Is the postive integer x odd

by Vemuri » Sun May 03, 2009 12:03 am
Question is asking if x is odd?

Stmt 1: x = y^2 + 4y +6 . We do not know if y is even or odd
If y is odd ==> x = odd+even+even ==> x = odd
If y is even ==> x = even+even+even ==> even
So, this statement is not sufficient

Stmt2: x = 9z^2 + 7z - 10. We do not know if z is even or odd
If z is odd ==> x = odd+odd-even = even
If z is even ==> x = even+even-even = even
This statement is sufficient.

Hence B is the answer.
Top
Post new topic Post Reply
• Page 1 of 1