GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 19 Jun 2018, 20:50

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# A certain list consists of several different integers. Is

Author Message
Intern
Joined: 18 Jul 2008
Posts: 34
A certain list consists of several different integers. Is [#permalink]

### Show Tags

12 Aug 2008, 11:03
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

A certain list consists of several different integers. Is the product of all the integers in the list positive?

1. The product of the greatest and the smallest of the integers in the list is positive.
2. There is an even number of integers in the list

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

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

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
SVP
Joined: 30 Apr 2008
Posts: 1841
Location: Oklahoma City
Schools: Hard Knocks

### Show Tags

12 Aug 2008, 11:13
1
C

#1. If you have 3 integers, but they're all negative, then you'll have a negative product, and the product of the largest and smallest would be positive be cause Neg * Neg = Pos. If you have 3 integers but they're all positive the product of all will be Positive. Insufficient because you can have it two ways and the question is "Is the product of all the integers in the list [ALWAYS] positive?" With ALWAYS implied. INSUFFICIENT

#2 Insufficient. If you have an even number of integers, say 4, you can have Pos * Pos * Pos * Neg = Neg. Having an even number doesn't do anything for you. INSUFFICIENT

TOGETHER. If the product of smallest and largest is positive, then they must be the same sign. And because #2 says there is an even number of integers, it rules out the chance of all being negative, but an odd number of them. TOGETHER = SUFFICIENT = Answer C

mba9now wrote:
A certain list consists of several different integers. Is the product of all the integers in the list positive?

1. The product of the greatest and the smallest of the integers in the list is positive.
2. There is an even number of integers in the list

_________________

------------------------------------
J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a\$\$.

GMAT Club Premium Membership - big benefits and savings

Intern
Joined: 18 Jul 2008
Posts: 34

### Show Tags

12 Aug 2008, 11:18
a little lost ...

How does having even number of integers rules out that all are neg?
SVP
Joined: 30 Apr 2008
Posts: 1841
Location: Oklahoma City
Schools: Hard Knocks

### Show Tags

12 Aug 2008, 11:31
i'm not entirely clear what you're asking. It doesn't rule out that they are all negative, it just makes it that it doesn't matter.

Lets say you have 4 numbers.

-1, -2, -3 , -4. The product of these is 24. -1 * -2 = +2 and -3 * -4 = +12. +2 * +12 = 24.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

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

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

------------------------------------
J Allen Morris
**I'm pretty sure I'm right, but then again, I'm just a guy with his head up his a\$\$.

GMAT Club Premium Membership - big benefits and savings

Re: DS: Integers   [#permalink] 12 Aug 2008, 11:31
Display posts from previous: Sort by