Need Help in Data Sufficiency Problem

This topic has expert replies
Source: — Data Sufficiency |

User avatar
Master | Next Rank: 500 Posts
Posts: 335
Joined: Mon Mar 21, 2011 11:31 pm
Location: Australia / India
Thanked: 37 times
Followed by:2 members

by melguy » Fri Jul 05, 2013 4:07 am
Uva@90 wrote:What is the value of X, if X and Y are two distinct integers and their product is 30 ?

1) X is an odd integer
2) X >Y
Statement 1

3 x 10 = 30
5 x 6 = 30
15 x 2 = 30

x can be 3,5,15
More than 1 value. Not Sufficient

Statement 2

15 x 2 = 30
10 x 3 = 30
6 x 5 = 30

x can be 15,10,6
More than 1 value. Not Sufficient

Combine
x is odd and x is > y

30 x 1
15 x 2
10 x 3
6 x 5
5 x 6
3 x 10
2 x 15
1 x 30


Only one seem to meet the criteria. So it appears the OA is C.

User avatar
Master | Next Rank: 500 Posts
Posts: 490
Joined: Thu Jul 04, 2013 7:30 am
Location: Chennai, India
Thanked: 83 times
Followed by:5 members

by Uva@90 » Fri Jul 05, 2013 6:46 pm
Hi Melguy,
Your answer matches with the answer sheet I have. But, why the following option being ignored,

-1 x -30 = 30
-3 x -10 = 30
-5 x -6 = 30

All the three statements comply with the statement 1 (x is an odd integer) & statement 2(x > y).
Correct me if am wrong.

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pm
Location: Vancouver, BC
Thanked: 5254 times
Followed by:1268 members
GMAT Score:770

by Brent@GMATPrepNow » Fri Jul 05, 2013 7:47 pm
Uva@90 wrote:What is the value of X, if X and Y are two distinct integers and their product is 30?

1) X is an odd integer
2) X > Y
Target question: What is the value of X?

Given: X and Y are two distinct integers and their product is 30

Statement 1: X is an odd integer
There are different sets of values that meet this condition. Here are two:
Case a: X = 15 and Y = 2
Case b: X = -5 and Y = -6
Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT

Statement 2: X > Y
There are different sets of values that meet this condition. Here are two:
Case a: X = 15 and Y = 2
Case b: X = -5 and Y = -6
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT

Statements 1 and 2 combined:
Here are 2 different sets of values that meet the given conditions:
Case a: X = 15 and Y = 2
Case b: X = -5 and Y = -6
Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT

Answer = E

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image

User avatar
Master | Next Rank: 500 Posts
Posts: 335
Joined: Mon Mar 21, 2011 11:31 pm
Location: Australia / India
Thanked: 37 times
Followed by:2 members

by melguy » Fri Jul 05, 2013 8:06 pm
Uva@90 wrote:Hi Melguy,
Your answer matches with the answer sheet I have. But, why the following option being ignored,

-1 x -30 = 30
-3 x -10 = 30
-5 x -6 = 30

All the three statements comply with the statement 1 (x is an odd integer) & statement 2(x > y).
Correct me if am wrong.
When will I learn to include negative numbers in integers!!! grrrrr

Yes, my mistake. If you include above the answer will be E.

User avatar
Master | Next Rank: 500 Posts
Posts: 358
Joined: Thu Apr 18, 2013 9:46 am
Location: Jeddah, Saudi Arabia
Thanked: 42 times
Followed by:7 members
GMAT Score:730

by faraz_jeddah » Sat Jul 06, 2013 8:32 am
Classic trap question!