
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
September 15th, 2010, 05:43 AM  #1 
Newbie Joined: Jun 2009 Posts: 14 Thanks: 0  six digit numbers...
ok....here is a nice problem/brain teaser...: How many six digit numbers can be formed such that the sum of the first three digits is equal to the sum of the last three digits??? (Leading zeros are not allowed, and the repetition of digits is allowed.) HELP 
September 15th, 2010, 08:13 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 19,168 Thanks: 1640 
50412 (of which 5856 have no repetition)

September 15th, 2010, 08:55 AM  #3 
Global Moderator Joined: Nov 2009 From: Northwest Arkansas Posts: 2,766 Thanks: 4  Re: six digit numbers...
I got 50413. Must have counted one twice...

September 16th, 2010, 12:41 AM  #4 
Newbie Joined: Jun 2009 Posts: 14 Thanks: 0  Re: six digit numbers...
could you please explain a little ???

September 16th, 2010, 01:47 PM  #5 
Global Moderator Joined: Dec 2006 Posts: 19,168 Thanks: 1640 
I checked each 6digit integer.

September 16th, 2010, 03:01 PM  #6  
Global Moderator Joined: Nov 2009 From: Northwest Arkansas Posts: 2,766 Thanks: 4  Re: Quote:
 

Tags 
digit, numbers 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Find two 3digit numbers  coax  Number Theory  0  May 8th, 2013 09:45 PM 
the last ndigit numbers  Albert.Teng  Algebra  2  November 4th, 2012 08:37 PM 
N distincts Digit numbers  panky  Algebra  1  October 21st, 2012 06:20 AM 
How many nonequivalent 10digit numbers are there?  Solarmew  Applied Math  6  April 13th, 2012 01:46 PM 
10 digit natural numbers  MATHS  Number Theory  2  November 2nd, 2007 08:51 PM 