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

It is currently 20 Oct 2019, 19:34

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

Which of the following is closer to (25!+24!)/(25!-24!)?

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

Hide Tags

Find Similar Topics 
Math Revolution GMAT Instructor
User avatar
V
Joined: 16 Aug 2015
Posts: 8023
GMAT 1: 760 Q51 V42
GPA: 3.82
Which of the following is closer to (25!+24!)/(25!-24!)?  [#permalink]

Show Tags

New post 13 Mar 2016, 22:18
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

90% (01:07) correct 10% (01:24) wrong based on 247 sessions

HideShow timer Statistics

Which of the following is closer to (25!+24!)/(25!-24!)?

A. 49
B. 36
C. 25
D. 16
E. 1


* A solution will be posted in two days.

_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $79 for 1 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"
Manager
Manager
avatar
Joined: 09 Jun 2015
Posts: 88
Re: Which of the following is closer to (25!+24!)/(25!-24!)?  [#permalink]

Show Tags

New post 13 Mar 2016, 22:31
MathRevolution wrote:
Which of the following is closer to (25!+24!)/(25!-24!)?

A. 49
B. 36
C. 25
D. 16
E. 1


* A solution will be posted in two days.

Take 24! outside in both numerator and denominator. You can cancel out.
What you get is (25+1)/(25-1) = 26/24 = 13/12
Math Expert
avatar
V
Joined: 02 Aug 2009
Posts: 7992
Re: Which of the following is closer to (25!+24!)/(25!-24!)?  [#permalink]

Show Tags

New post 13 Mar 2016, 22:48
MathRevolution wrote:
Which of the following is closer to (25!+24!)/(25!-24!)?

A. 49
B. 36
C. 25
D. 16
E. 1


* A solution will be posted in two days.



Hi,
25! and 24! may seem close to each other.. but 25! is 25 times more than 24!..
so if you add 1/25th of an item to that item or subtract 1/25th of an item from itself, they will be close to each other ..
as the choice has only 1 and rest are >15, we can safely take answer as 1..

If we had choices like 1 , 1.2 , 1.5 , then it would be necessary to calculate..
Here ofcourse, it is easy calculations but we should be ready to read into the info a Q provides..

_________________
GMAT Club Legend
GMAT Club Legend
User avatar
V
Joined: 12 Sep 2015
Posts: 4015
Location: Canada
Re: Which of the following is closer to (25!+24!)/(25!-24!)?  [#permalink]

Show Tags

New post 14 Mar 2016, 07:39
2
1
MathRevolution wrote:
Which of the following is closer to (25!+24!)/(25!-24!)?

A. 49
B. 36
C. 25
D. 16
E. 1


* A solution will be posted in two days.

Notice that 25! = (25)(24!), so we can factor out 24! from top and bottom.

(25!+24!)/(25!-24!) = [24!(25+1)]/[24!(25-1)]
= (25+1)/(24-1)
= 26/24
≈ 1
Answer: E

Cheers,
Brent
_________________
Test confidently with gmatprepnow.com
Image
Math Revolution GMAT Instructor
User avatar
V
Joined: 16 Aug 2015
Posts: 8023
GMAT 1: 760 Q51 V42
GPA: 3.82
Re: Which of the following is closer to (25!+24!)/(25!-24!)?  [#permalink]

Show Tags

New post 15 Mar 2016, 18:44
Which of the following is closer to (25!+24!)/(25!-24!)?

A. 49
B. 36
C. 25
D. 16
E. 1


-> (25!+24!)/(25!-24!)=(25*24!+24!)/(25*24!-24!)=(25+1)24!/(25-1)24!=26/24=13/12=approximately 1.
Thus, the answer is 1.
_________________
MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $79 for 1 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"
GMAT Tutor
User avatar
G
Status: Tutor - BrushMyQuant
Joined: 05 Apr 2011
Posts: 622
Location: India
Concentration: Finance, Marketing
Schools: XLRI (A)
GMAT 1: 700 Q51 V31
GPA: 3
WE: Information Technology (Computer Software)
Re: Which of the following is closer to (25!+24!)/(25!-24!)?  [#permalink]

Show Tags

New post 03 May 2017, 19:10
1
Top Contributor
Bunuel: Please UnTag Probability
MathRevolution wrote:
Which of the following is closer to (25!+24!)/(25!-24!)?

A. 49
B. 36
C. 25
D. 16
E. 1


* A solution will be posted in two days.

_________________
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58434
Re: Which of the following is closer to (25!+24!)/(25!-24!)?  [#permalink]

Show Tags

New post 03 May 2017, 22:35
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 13318
Re: Which of the following is closer to (25!+24!)/(25!-24!)?  [#permalink]

Show Tags

New post 05 Nov 2018, 04:27
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
GMAT Club Bot
Re: Which of the following is closer to (25!+24!)/(25!-24!)?   [#permalink] 05 Nov 2018, 04:27
Display posts from previous: Sort by

Which of the following is closer to (25!+24!)/(25!-24!)?

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





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