It is currently 24 Nov 2017, 00:44

### 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

# How does one deal with Factorials? Is there a trick to

Author Message
Intern
Joined: 21 Feb 2008
Posts: 43

Kudos [?]: 4 [0], given: 0

How does one deal with Factorials? Is there a trick to [#permalink]

### Show Tags

02 Mar 2008, 15:22
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

How does one deal with Factorials? Is there a trick to dealing with them?

ie: What does this equal?

50!-40! / 40!+60!

Or

50! + 13

What's the trick so that you don't have to multiply out the whole thing?

Thanks.

Kudos [?]: 4 [0], given: 0

SVP
Joined: 29 Aug 2007
Posts: 2471

Kudos [?]: 857 [0], given: 19

### Show Tags

03 Mar 2008, 01:42
Liquid wrote:
How does one deal with Factorials? Is there a trick to dealing with them?

ie: What does this equal?

50!-40! / 40!+60!

Or

50! + 13

What's the trick so that you don't have to multiply out the whole thing?

Thanks.

= 50!-40! / 40!+60!
= 40! [(41x42x...x50) - 1]/40! [(1) + 41x42x43x....60)]
= [(41x42x...x50) - 1] / [(1) + 41x42x43x....60)]

Can not be done anything with "50! + 13".
_________________

Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html

GT

Kudos [?]: 857 [0], given: 19

Intern
Joined: 21 Feb 2008
Posts: 43

Kudos [?]: 4 [0], given: 0

### Show Tags

03 Mar 2008, 18:37
Sorry, I'm not following your outline...

Kudos [?]: 4 [0], given: 0

Re: Dealing with Factorials?   [#permalink] 03 Mar 2008, 18:37
Display posts from previous: Sort by

# How does one deal with Factorials? Is there a trick to

Moderator: chetan2u

 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®.