Last visit was: 21 May 2026, 08:01 It is currently 21 May 2026, 08:01
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
User avatar
jamesrwright3
User avatar
Joined: 08 May 2004
Last visit: 26 Apr 2007
Posts: 135
Own Kudos:
2
Location: Pittsburgh
Posts: 135
Kudos: 2
Does anyone have a link where I can learn the theory to 05 Aug 2006, 14:01
Kudos
Add Kudos
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
N
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

History

Date
Time
Result
Not Attempted Yet
Does anyone have a link where I can learn the theory to solve these problems? I have never seen something like this before



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
User avatar
jamesrwright3
User avatar
Joined: 08 May 2004
Last visit: 26 Apr 2007
Posts: 135
Own Kudos:
2
Location: Pittsburgh
Posts: 135
Kudos: 2
Does anyone have a link where I can learn the theory to 05 Aug 2006, 14:37
Kudos
Add Kudos
Bookmarks
Bookmark this Post
CHEN
5^21 * 4^11 = 5^21 * 2^22 = 10^21 * 2
Show more



I am slightly confused I see how we got 2^22 on the left side.
Why does 10^21*2 = what is on the left hand side?
User avatar
CHEN
User avatar
Joined: 09 Jul 2006
Last visit: 17 Jan 2007
Posts: 95
Own Kudos:
2
Posts: 95
Kudos: 2
Does anyone have a link where I can learn the theory to 05 Aug 2006, 15:08
Kudos
Add Kudos
Bookmarks
Bookmark this Post
5^21 * 2^22 = ( 5^21*2^21 )*2
= (10*21) *2 8-)
User avatar
heman
User avatar
Joined: 20 Mar 2006
Last visit: 12 Dec 2006
Posts: 104
Own Kudos:
10
Posts: 104
Kudos: 10
Does anyone have a link where I can learn the theory to 05 Aug 2006, 15:13
Kudos
Add Kudos
Bookmarks
Bookmark this Post
jamesrwright3
Does anyone have a link where I can learn the theory to solve these problems? I have never seen something like this before
Show more


(5^21)(2^22) = 2*(2*5)^n
(5^21)(2^22) = 2*(2^n)*(5^n)
(5^21)(2^22) = 2^(n+1)*(5^n)

Hence comparing exponents of Left hand side and righ hand side

n=21



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
Moderator:
Bunuel
Math Expert
110763 posts