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

It is currently 17 Oct 2018, 15:41

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

If n is a positive integer and the product of all integers

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

Hide Tags

Intern
Intern
avatar
Joined: 18 Feb 2018
Posts: 1
Re: If n is a positive integer and the product of all integers  [#permalink]

Show Tags

New post 18 Mar 2018, 14:04
Can someone please confirm why the answer is not 10? (i.e. 5*2). I understand how to do prime factorization just want to confirm my understanding of why the answer is not 2*5. Thanks for your help.
Director
Director
User avatar
P
Joined: 09 Mar 2016
Posts: 940
Re: If n is a positive integer and the product of all integers  [#permalink]

Show Tags

New post 18 Mar 2018, 14:15
rsciretta14 wrote:
Can someone please confirm why the answer is not 10? (i.e. 5*2). I understand how to do prime factorization just want to confirm my understanding of why the answer is not 2*5. Thanks for your help.




rsciretta14 because prime factors of 990 are 2 * 5 * 3 * 3* 11. the answer is not 10 because 11 prime factor is missing :)
Intern
Intern
avatar
Joined: 03 Jul 2018
Posts: 1
Re: If n is a positive integer and the product of all integers  [#permalink]

Show Tags

New post 22 Sep 2018, 02:19
SunnyDelight wrote:
just entered this in google and you're right! (1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10 * 11) / 990 = 40 320

meanwhile (1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * 10) / 990 = 3 665.45455 wouldn't work

It makes sense because the highest prime factor of 990 must also be a factor of any multiple of 990.

I guess I need to do more practice problems involving multiples and number properties.



Thank you man! This helped me understand the problem.
GMAT Club Bot
Re: If n is a positive integer and the product of all integers &nbs [#permalink] 22 Sep 2018, 02:19

Go to page   Previous    1   2   3   [ 43 posts ] 

Display posts from previous: Sort by

If n is a positive integer and the product of all integers

  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®.