Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 23 May 2013, 23:59
Customize  |  Hide

Search
Register
New posts
Unanswered

Adding exponents

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Intern
Intern
Joined: 08 Jul 2009
Posts: 6
Followers: 0

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

Adding exponents [#permalink] New post 30 Jul 2009, 18:56
I'm sure this question has been asked, but it's hard to search for:

2^1 +2^1 +2^2+ 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 =

I'm having trouble factoring it out.

Thank you!
1 KUDOS received
Manager
Manager
Joined: 10 Jul 2009
Posts: 174
Followers: 1

Kudos [?]: 17 [1] , given: 8

GMAT Tests User
Re: Adding exponents [#permalink] New post 30 Jul 2009, 19:28
1
This post received
KUDOS
2^1 +2^1 +2^2+ 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8

2^1 +2^1 = 2*2^1 = 2^2
2^2 + 2^2 = 2*2^2 = 2^3

So 2^1 +2^1 +2^2 form 2^3
Similarly 2^1 +2^1 +2^2+ 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 is equal to 2^9
Intern
Intern
Status: Applying
Joined: 30 Jul 2009
Posts: 40
Followers: 0

Kudos [?]: 4 [0], given: 3

Re: Adding exponents [#permalink] New post 31 Jul 2009, 12:43
[EDIT - REMOVED BY USER]

Last edited by nplaneta on 17 Jun 2012, 17:39, edited 1 time in total.
Intern
Intern
Joined: 08 Jul 2009
Posts: 6
Followers: 0

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

Re: Adding exponents [#permalink] New post 31 Jul 2009, 16:47
Excellent, thank you!
Manager
Manager
Joined: 02 Oct 2010
Posts: 163
Followers: 2

Kudos [?]: 1 [0], given: 29

GMAT Tests User
Re: Adding exponents [#permalink] New post 01 Jan 2011, 23:00
nplaneta wrote:
Aleehsgonji wrote:
2^1 +2^1 +2^2+ 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8

2^1 +2^1 = 2*2^1 = 2^2
2^2 + 2^2 = 2*2^2 = 2^3

So 2^1 +2^1 +2^2 form 2^3
Similarly 2^1 +2^1 +2^2+ 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 is equal to 2^9



I was stumped by this as well. Great explaination. Kudos to you.


Very Nice Explanation..
U have made it so very precise and clear..
Intern
Intern
Joined: 19 Oct 2011
Posts: 1
Followers: 0

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

GMAT Tests User
Re: Adding exponents [#permalink] New post 22 Oct 2011, 02:24
Thanks a lot. It. Looks so easy now!
Intern
Intern
Joined: 19 Oct 2011
Posts: 17
GMAT 1: 790 Q51 V50
GPA: 3.93
Followers: 1

Kudos [?]: 2 [0], given: 0

Re: Adding exponents [#permalink] New post 27 Oct 2011, 21:37
Alternate solution (not really practical here but maybe in a similar problem?):

2^1 +2^1 +2^2+ 2^3 + 2^4 + 2^5 + 2^6 + 2^7 + 2^8 = ?

Represented in binary:

0000000010 +
0000000010 +
0000000100 +
0000001000 +
0000010000 +
0000100000 +
0001000000 +
0010000000 +
0100000000 =
----------------
1000000000

I've just started my GMAT prep recently so feel free to disregard if this doesn't sound helpful, but changing bases can be helpful sometimes =]
Re: Adding exponents   [#permalink] 27 Oct 2011, 21:37
    Similar topics Author Replies Last post
Similar
Topics:
 New posts exponent cavanbas 1 11 Jan 2005, 20:30
New posts Exponents tomgw 4 28 Sep 2005, 04:31
New posts Ads ashkrs 1 02 Sep 2007, 08:13
New posts Adding exponents - Easy but its teasing my brain djdela 7 22 Jul 2008, 16:18
New posts EXPERTS_POSTS_IN_THIS_TOPIC Adding exponents with the same base hitman5532 5 15 Jan 2013, 16:18
Display posts from previous: Sort by

Adding exponents

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

Search for:


cron

GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com