Last visit was: 23 Apr 2026, 11:47 It is currently 23 Apr 2026, 11:47
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
User avatar
young_gun
User avatar
Current Student
Joined: 31 Aug 2007
Last visit: 30 Jan 2011
Posts: 282
Own Kudos:
Given Kudos: 1
Posts: 282
Kudos: 715
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
12345678
Joined: 09 Jul 2007
Last visit: 19 Dec 2007
Posts: 83
Own Kudos:
Posts: 83
Kudos: 700
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
StartupAddict
Joined: 31 Mar 2007
Last visit: 14 May 2009
Posts: 362
Own Kudos:
Location: Canada eh
Posts: 362
Kudos: 190
Kudos
Add Kudos
Bookmarks
Bookmark this Post
User avatar
IrinaOK
Joined: 22 Aug 2007
Last visit: 01 Jan 2008
Posts: 275
Own Kudos:
Posts: 275
Kudos: 509
Kudos
Add Kudos
Bookmarks
Bookmark this Post
young_gun
If x=100^100, x^x=10^k, k=?


X=100^100=10^2*100=10^200

X^X=10^200^(10^200)=10^(200*10^200)=10^(2*10^2*10^200)=
10^ 2*10^202

10^ 2*10^202=10^K

K=2*10^202
User avatar
12345678
Joined: 09 Jul 2007
Last visit: 19 Dec 2007
Posts: 83
Own Kudos:
Posts: 83
Kudos: 700
Kudos
Add Kudos
Bookmarks
Bookmark this Post
StartupAddict
k = 2 * 10^202

how the hell did you get 10 000 lol

x^x = (100^100)^(100^100)


arghhh again a careless mistake..its already 3am..my brain is completely dead! i better go to sleep..
User avatar
Ravshonbek
Joined: 09 Jul 2007
Last visit: 15 Jul 2008
Posts: 565
Own Kudos:
Location: London
Posts: 565
Kudos: 575
Kudos
Add Kudos
Bookmarks
Bookmark this Post
young_gun
If x=100^100, x^x=10^k, k=?


x=100^100 ----> x=10^200
x^x=10^k -----> x=10^(k/x)

x=x

10^(k/x)=10^200, drop the bases

k/x=200
k=200*x ----->k=2*10^2*10^200 -----> k=2*10^202=2*100^101
avatar
slsu
Joined: 28 Aug 2007
Last visit: 22 Jul 2009
Posts: 9
Own Kudos:
Posts: 9
Kudos: 79
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Hi,

Can you explain how you got from x^x=10^k -----> x=10^(k/x)?
User avatar
young_gun
User avatar
Current Student
Joined: 31 Aug 2007
Last visit: 30 Jan 2011
Posts: 282
Own Kudos:
Given Kudos: 1
Posts: 282
Kudos: 715
Kudos
Add Kudos
Bookmarks
Bookmark this Post
slsu
Hi,

Can you explain how you got from x^x=10^k -----> x=10^(k/x)?


Sure, it's just a way to isolate x.

x^(x)(1/x)=x, apply the 1/x power to both sides...
User avatar
Ravshonbek
Joined: 09 Jul 2007
Last visit: 15 Jul 2008
Posts: 565
Own Kudos:
Location: London
Posts: 565
Kudos: 575
Kudos
Add Kudos
Bookmarks
Bookmark this Post
slsu
Hi,

Can you explain how you got from x^x=10^k -----> x=10^(k/x)?


x=10^(k/x)
x=10^200
x=x
10^(k/x)=10^200
drop the bases

k/x=200
k=200x then bring x back



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 Quantitative Questions 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!