It is currently 21 Oct 2017, 23:46

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Which of the following best approximates the value of q if

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Director
Director
avatar
Joined: 23 May 2008
Posts: 801

Kudos [?]: 84 [0], given: 0

Which of the following best approximates the value of q if [#permalink]

Show Tags

New post 28 Aug 2008, 16:28
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Which of the following best approximates the value of q if 5^28+3^11=5^q ?


39
30
28
27
17

Kudos [?]: 84 [0], given: 0

Expert Post
GMAT Tutor
avatar
B
Joined: 24 Jun 2008
Posts: 1339

Kudos [?]: 1956 [0], given: 6

Re: from mgmat number properties question bank [#permalink]

Show Tags

New post 28 Aug 2008, 16:51
bigtreezl wrote:
Which of the following best approximates the value of q if 5^28+3^11=5^q ?


39
30
28
27
17


Notice that 5^28+5^28+5^28+5^28+5^28 = 5*5^28 = 5^29

So 5^28 + 3^11 is much smaller than 5^29, but is clearly larger than 5^28, so q is closest to 28.
_________________

GMAT Tutor in Toronto

If you are looking for online GMAT math tutoring, or if you are interested in buying my advanced Quant books and problem sets, please contact me at ianstewartgmat at gmail.com

Kudos [?]: 1956 [0], given: 6

Director
Director
avatar
Joined: 23 May 2008
Posts: 801

Kudos [?]: 84 [0], given: 0

Re: from mgmat number properties question bank [#permalink]

Show Tags

New post 28 Aug 2008, 16:57
gotcha, makes more sense when you put it like that

OA is 28

Kudos [?]: 84 [0], given: 0

Current Student
User avatar
Joined: 11 May 2008
Posts: 555

Kudos [?]: 222 [0], given: 0

Re: from mgmat number properties question bank [#permalink]

Show Tags

New post 28 Aug 2008, 19:15
good problem ... +1 IAN...

Kudos [?]: 222 [0], given: 0

Intern
Intern
User avatar
Joined: 16 Feb 2006
Posts: 30

Kudos [?]: 9 [0], given: 6

Location: ZURICH
GMAT ToolKit User
Re: from mgmat number properties question bank [#permalink]

Show Tags

New post 31 Aug 2008, 03:21
Which of the following best approximates the value of q if 5^28+3^11=5^q ?


39
30
28
27
17


5^28+3^11=5^q
= (4+1)^28 + (4-1)^11 = (4+1)^q use this also approximation

answer will be 28
_________________

TRY N TRY UNTIL U SUCCEED

Kudos [?]: 9 [0], given: 6

Re: from mgmat number properties question bank   [#permalink] 31 Aug 2008, 03:21
Display posts from previous: Sort by

Which of the following best approximates the value of q if

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| 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®.