Hi Guest,

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re M25-24 [#permalink]

16 Sep 2014, 00:23

Expert Reply

Official Solution:

Statement (1) by itself is sufficient. S1 tells that the mentioned pair is (1, -1). The product of these numbers is $-1 * 1 = -1$.

Statement (2) by itself is insufficient. Consider $(1, -1)$ and $(1, 3)$.

Answer: A
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

jamesbinford

Intern

Joined: 22 Sep 2012

Posts: 1

Concentration: Technology, Strategy

GPA: 2.97

WE:Analyst (Consulting)

Re: M25-24 [#permalink]

14 Jan 2015, 17:57

Sorry to bother - but why is the number 0 ignored here?

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re: M25-24 [#permalink]

15 Jan 2015, 00:09

Expert Reply

jamesbinford wrote:

Sorry to bother - but why is the number 0 ignored here?

0 is even, not odd.
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

rhio

Intern

Joined: 25 Apr 2015

Posts: 10

Schools: ISB '17, NTU '17, NUS '18, SMU '17, Cass '17, WBS '18

M25-24 [#permalink]

30 Oct 2015, 22:05

But can't I use (-3,3) as the consecutive odd integers. If yes then the answer would be 9 and then A will not be sufficient. please help.

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re: M25-24 [#permalink]

31 Oct 2015, 02:48

Expert Reply

rhio wrote:

But can't I use (-3,3) as the consecutive odd integers. If yes then the answer would be 9 and then A will not be sufficient. please help.

Consecutive odd or even integers are those with common difference of 2. So, for example, -1 and 1 or 9 and 11. -3 and 3 are not consecutive odd integers.
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Devbek

Intern

Joined: 06 Feb 2016

Posts: 43

Location: Poland

Concentration: Finance, Accounting

GMAT 1: 730 Q49 V41 Verified score

GPA: 3.5

Re: M25-24 [#permalink]

27 Aug 2016, 04:07

Bunuel is a patient genius!

meesamalim

Intern

Joined: 05 Sep 2016

Posts: 2

Re: M25-24 [#permalink]

11 Sep 2016, 06:15

so how does 1 and 3 satisfy statement 1 of a number being negative?

Bunuel wrote:

rhio wrote:

But can't I use (-3,3) as the consecutive odd integers. If yes then the answer would be 9 and then A will not be sufficient. please help.

Consecutive odd or even integers are those with common difference of 2. So, for example, -1 and 1 or 9 and 11. -3 and 3 are not consecutive odd integers.

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re: M25-24 [#permalink]

11 Sep 2016, 06:18

Expert Reply

meesamalim wrote:

so how does 1 and 3 satisfy statement 1 of a number being negative?

Bunuel wrote:

rhio wrote:

But can't I use (-3,3) as the consecutive odd integers. If yes then the answer would be 9 and then A will not be sufficient. please help.

Consecutive odd or even integers are those with common difference of 2. So, for example, -1 and 1 or 9 and 11. -3 and 3 are not consecutive odd integers.

Where it's said that (1, 3) satisfy the first statement???
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

meesamalim

Intern

Joined: 05 Sep 2016

Posts: 2

Re: M25-24 [#permalink]

11 Sep 2016, 07:16

Consecutive odd or even integers are those with common difference of 2. So, for example, -1 and 1 or 9 and 11. -3 and 3 are not consecutive odd integers.[/quote][/quote]

Where it's said that (1, 3) satisfy the first statement???[/quote]

so statement one you are saying is sufficient right? statement one says either one of the numbers are negative. hence why cannot 1,3 be used as consecutive integers which fails the statement?

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re: M25-24 [#permalink]

11 Sep 2016, 07:31

Expert Reply

meesamalim wrote:

so statement one you are saying is sufficient right? statement one says either one of the numbers are negative. hence why cannot 1,3 be used as consecutive integers which fails the statement?

Please read carefully: (1) Exactly one of the integers is negative.
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

bpdulog

Manager

Joined: 14 Aug 2012

Posts: 63

Location: United States

Schools: MBA@UNC"21 (A$), Rice PMBA '21 (A), USC MBA.PM '22 (A), McDonough Evening'22 (A), NYU Stern (A), Tepper '21 (A)

GMAT 1: 620 Q43 V33

GMAT 2: 690 Q47 V38

Re: M25-24 [#permalink]

30 Jun 2018, 03:11

Hi,

The way this question is worded is kind of confusing. When they are asking what is the product, I am assuming a certain numerical value is what needs to be solved for.

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re: M25-24 [#permalink]

30 Jun 2018, 09:22

Expert Reply

bpdulog wrote:

Hi,

The way this question is worded is kind of confusing. When they are asking what is the product, I am assuming a certain numerical value is what needs to be solved for.

The question is fine. Yes, it's asks for a product, and (1) gives exact numerical answer: The product of these numbers is −1∗1=−1 .
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

sayankh

Intern

Joined: 08 Apr 2018

Posts: 16

Re: M25-24 [#permalink]

03 Aug 2018, 21:39

If I understand it correctly, this particular question is essentially asking for the value of the product, right?

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re: M25-24 [#permalink]

03 Aug 2018, 23:26

Expert Reply

sayankh wrote:

If I understand it correctly, this particular question is essentially asking for the value of the product, right?

Yes, it's asks for a product, and (1) gives exact numerical answer: The product of these numbers is −1∗1=−1 .
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

saurabh9gupta

Senior Manager

Joined: 10 Jan 2013

Posts: 288

Location: India

Concentration: General Management, Strategy

Schools: Kenan-Flagler '24 (D)

GRE 1: Q163 V155

GPA: 3.95

Re: M25-24 [#permalink]

05 Aug 2018, 04:36

Bunuel wrote:

What is the product of a certain pair of consecutive odd integers?

(1) Exactly one of the integers is negative.

(2) At least one of the integers is positive.

Bunuel.

How can we assume only 2 numbers?

I mean we can have the series as -1, 1, 3, 5 etc as well.. and so by this logic, A would not be sufficient.

if we include zero in the terms, then we get a conclusive answer.. but Zero is not Odd.

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re: M25-24 [#permalink]

05 Aug 2018, 06:18

Expert Reply

saurabh9gupta wrote:

Bunuel wrote:

What is the product of a certain pair of consecutive odd integers?

(1) Exactly one of the integers is negative.

(2) At least one of the integers is positive.

Pair of numbers = TWO numbers.
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

saurabh9gupta

Senior Manager

Joined: 10 Jan 2013

Posts: 288

Location: India

Concentration: General Management, Strategy

Schools: Kenan-Flagler '24 (D)

GRE 1: Q163 V155

GPA: 3.95

Re: M25-24 [#permalink]

05 Aug 2018, 11:03

Bunuel wrote:

saurabh9gupta wrote:

Bunuel wrote:

What is the product of a certain pair of consecutive odd integers?

(1) Exactly one of the integers is negative.

(2) At least one of the integers is positive.

Pair of numbers = TWO numbers.

yup got it.. silly mistakes like these cost a lot in the exam

Megha1119

Intern

Joined: 29 Jun 2017

Posts: 33

Re: M25-24 [#permalink]

19 Sep 2019, 06:41

Bunuel: If I assume the question to be asking whether the product of two numbers is positive or negative, Statement 1 is sufficient. But if I interpret the question to be asking what the value is, then Statement 1 is not sufficient as the product of two unknowns can be different.

What is the correct interpretation? Value or positive/negative?

Thanks,
Megha.

Bunuel

Math Expert

Joined: 02 Sep 2009

Posts: 86420

Re: M25-24 [#permalink]

19 Sep 2019, 06:57

Expert Reply

Megha1119 wrote:

The question asks about the value of the product of two integers, which, from (1) turns out to be -1.
_________________

New to the GMAT CLUB Forum?

My Signature Questions' Collection:

What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics