Last visit was: 21 Nov 2024, 13:45 It is currently 21 Nov 2024, 13:45
Decision Tracker
My Rewards
New comers' posts
New posts
Unanswered

Close

GRE Prep 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 GRE 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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel
PREVIOUS TOPIC
NEXT TOPIC

Which of the following is divisible by an odd number of diff

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 30003
Own Kudos [?]: 36336 [6]
Given Kudos: 25927
Send PM
Which of the following is divisible by an odd number of diff [#permalink] New post   21 May 2019, 11:39
1
Expert Reply
5
Bookmarks
00:00

Question Stats:

41% (01:08) correct 58% (01:08) wrong based on 55 sessions

Hide Show timer Statistics

Which of the following is divisible by an odd number of different positive integers?

Indicate all possible numbers.

A. 9

B. 17

C. 24

D. 36

E. 42
ShowHide Answer
Official Answer
A,D
Most Helpful Expert Reply
User avatar
B
MyGuruStefan
GRE Prep Club Tests Editor
Joined: 13 May 2019
Affiliations: Partner at MyGuru LLC.
Posts: 186
Own Kudos [?]: 332 [5]
Given Kudos: 5
Location: United States
GMAT 1: 770 Q51 V44
GRE 1: Q169 V168
WE:Education (Education)
Send PM
Re: Which of the following is divisible by an odd number of diff [#permalink] New post   26 May 2019, 07:52
4
Expert Reply
1
Bookmarks
Quote:
Which of the following is divisible by an odd number of different positive integers?

Indicate all possible numbers.

Only perfect squares have an odd number of factors, since factors are inherently paired and only a perfect square includes a factor paired with itself to create a redundant factor pair.

Only 9 and 36 are perfect squares available in the choices. Select Choices A and D.
General Discussion
avatar
jelal123
Manager
Manager
Joined: 08 Dec 2018
Posts: 94
Own Kudos [?]: 70 [0]
Given Kudos: 0
Send PM
Re: Which of the following is divisible by an odd number of diff [#permalink] New post   07 Jun 2019, 22:43
the question confused me !
So, basically , it asks that what number ( as in the options) has odd number of positive factors, right?
Now, it is really easy as has been explained above. Thanks for the explanation
User avatar
B
MyGuruStefan
GRE Prep Club Tests Editor
Joined: 13 May 2019
Affiliations: Partner at MyGuru LLC.
Posts: 186
Own Kudos [?]: 332 [0]
Given Kudos: 5
Location: United States
GMAT 1: 770 Q51 V44
GRE 1: Q169 V168
WE:Education (Education)
Send PM
Re: Which of the following is divisible by an odd number of diff [#permalink] New post   08 Jun 2019, 07:40
1
Expert Reply
jelal123 wrote:
the question confused me !
So, basically , it asks that what number ( as in the options) has odd number of positive factors, right?
Now, it is really easy as has been explained above. Thanks for the explanation

I'm glad you found the explanation helpful!
avatar
B
Chanchal
Manager
Manager
Joined: 04 Oct 2023
Posts: 64
Own Kudos [?]: 8 [0]
Given Kudos: 929
Send PM
Re: Which of the following is divisible by an odd number of diff [#permalink] New post   25 Sep 2024, 15:52
jelal123 wrote:
the question confused me !
So, basically , it asks that what number ( as in the options) has odd number of positive factors, right?
Now, it is really easy as has been explained above. Thanks for the explanation



Still Bit COnfused..?? Can You Please Explain..?
User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 30003
Own Kudos [?]: 36336 [0]
Given Kudos: 25927
Send PM
Re: Which of the following is divisible by an odd number of diff [#permalink] New post   26 Sep 2024, 02:38
Expert Reply
OE


The right answer(s) for this question must have an odd number of factors in order to be divisible by an odd number of different positive integers. First, eliminate any prime numbers since they are divisible only by themselves and 1. (B) 17 is a prime number. Now check the remaining choices. The factors of 9 are 1, 3, and 9, so (A) is a correct choice. The factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24 for a total of 8, so eliminate (C). The distinct factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36 for a total of 9, so (D) is a correct choice. Finally, the factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. Since there are 8 factors, (E) is incorrect. The correct choices are (A) and (D).
Prep Club for GRE Bot
gmatclubot
Re: Which of the following is divisible by an odd number of diff [#permalink]
26 Sep 2024, 02:38
Moderators:
adewale223
GRE Instructor
84 posts
bronaugust
GRE Forum Moderator
37 posts
BrushMyQuant
Moderator
1111 posts
VibhuAnurag
GRE Instructor
234 posts

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

Main navigation

Partners

GRE Resources

www.ets.org/gre | About | Terms and Conditions and Privacy Policy | Prep Club for GRE Rules | Contact