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

It is currently 22 Oct 2018, 15:58

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

The product of two integers is 40. Which of the following CANNOT be

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 50042
The product of two integers is 40. Which of the following CANNOT be  [#permalink]

Show Tags

New post 06 Nov 2017, 00:31
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

85% (01:21) correct 15% (01:16) wrong based on 128 sessions

HideShow timer Statistics

Intern
Intern
avatar
Joined: 26 Oct 2017
Posts: 3
WE: Consulting (Computer Software)
Re: The product of two integers is 40. Which of the following CANNOT be  [#permalink]

Show Tags

New post 06 Nov 2017, 00:37
The factors of 40 are 1,2,4,8, 5,40,10. Negative as well as postive

So 8+5 = 13 is a sum
-40-1=-41 is a sum
10+4= 14 is a sum
-10-4 = -14 is a sum

So answer is C



Sent from my iPhone using GMAT Club Forum
Senior PS Moderator
User avatar
V
Joined: 26 Feb 2016
Posts: 3197
Location: India
GPA: 3.12
Premium Member CAT Tests
Re: The product of two integers is 40. Which of the following CANNOT be  [#permalink]

Show Tags

New post 06 Nov 2017, 04:25
1
The product of the two integers is \(40(2^3*5)\)
The various combination of integers can be 1*40,2*20,4*10,5*8.
Since we have a positive integer, it can be formed as a product
of two positive or negative integers.

The sum of these two integers could be -41,-22,-14,-13,13,14,22,41
Only Option C(3) CANNOT be sum of the two numbers!
_________________

You've got what it takes, but it will take everything you've got

Verbal Forum Moderator
User avatar
V
Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 2089
Location: India
Concentration: General Management, Strategy
Schools: Kelley '20, ISB '19
GPA: 3.2
WE: Information Technology (Consulting)
GMAT ToolKit User Reviews Badge CAT Tests
Re: The product of two integers is 40. Which of the following CANNOT be  [#permalink]

Show Tags

New post 06 Nov 2017, 18:47
1
Bunuel wrote:
The product of two integers is 40. Which of the following CANNOT be the sum of these two integers?

(A) -41

(B) -14

(C) 3

(D) 13

(E) 14

Prime factorization of 40 = 2^3 * 5
(A) -41 = -40 - 1

(B) -14 = -10 - 4

(C) 3 - Correct

(D) 13 = 8+5

(E) 14 = 10+4

Answer C
_________________

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it. - Henry Ford
The Moment You Think About Giving Up, Think Of The Reason Why You Held On So Long
+1 Kudos if you find this post helpful

Manager
Manager
User avatar
G
Status: Enjoying the Journey
Affiliations: ND
Joined: 26 Sep 2017
Posts: 114
Schools: Rotman '21
WE: Marketing (Consulting)
Re: The product of two integers is 40. Which of the following CANNOT be  [#permalink]

Show Tags

New post 07 Nov 2017, 00:40
IMO C

xy=40 = 1*40 = 2*20 = 4*10 = 5*8

only C can't be the sum to any of the above
_________________

"it takes more time to fix a mistake than to avoid one"
"Giving kudos" is a decent way to say "Thanks" and motivate contributors. Please use them, it won't cost you anything

High achievement always takes place in the framework of high expectation Charles Kettering
If we chase perfection we can catch excellence Vince Lombardi

GMAT Club Live: 5 Principles for Fast Math: https://gmatclub.com/forum/gmat-club-live-5-principles-for-fast-math-251028.html#p1940045
YouTube sessions by GMATNinja: https://gmatclub.com/forum/verbal-live-with-gmat-ninja-sc-pronouns-that-parallelism-250568.html#p1936104
The Best SC strategies - Amazing 4 videos by Veritas: https://gmatclub.com/forum/the-best-sc-strategies-amazing-4-videos-by-veritas-250377.html#p1934575

Target Test Prep Representative
User avatar
G
Status: Head GMAT Instructor
Affiliations: Target Test Prep
Joined: 04 Mar 2011
Posts: 2830
Re: The product of two integers is 40. Which of the following CANNOT be  [#permalink]

Show Tags

New post 08 Nov 2017, 17:23
1
Bunuel wrote:
The product of two integers is 40. Which of the following CANNOT be the sum of these two integers?

(A) -41

(B) -14

(C) 3

(D) 13

(E) 14


Let’s list the possible number combinations that can multiply to 40.

1, 40 or -1, -40

2, 20 or -2, -20

4, 10 or -4, -10

5, 8 or -5, -8

We see that the possible sums from the above pairs are:

41, -41, 22, -22, 14, -14, 13 and -13

From the given answer choices, the only sum that is not possible is 3.

Answer: C
_________________

Jeffery Miller
Head of GMAT Instruction

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

GMAT Club Bot
Re: The product of two integers is 40. Which of the following CANNOT be &nbs [#permalink] 08 Nov 2017, 17:23
Display posts from previous: Sort by

The product of two integers is 40. Which of the following CANNOT be

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.