
Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion 
 LinkBack  Thread Tools  Display Modes 
March 10th, 2018, 01:25 AM  #1 
Newbie Joined: Mar 2018 From: US Posts: 2 Thanks: 1  I'm having trouble solving a copycopy numbers
To get the copycopy of a positive integer, we write it twice without a space. For example, the copycopy of 2018 is 20182018. Is there a positive integer whose copycopy is a perfect square? If so, how many such positive integers can you find?

March 22nd, 2018, 01:21 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 18,719 Thanks: 1536 
What is the square of 90909090910?

March 22nd, 2018, 03:24 PM  #3 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 11,862 Thanks: 768 
Wanna close one? sqrt(570035570035) = 755006.999990728.... 

Tags 
copycopy, numbers, solving, trouble 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Trouble with Numbers  bluehero  Number Theory  0  December 30th, 2014 01:40 PM 
Having trouble converting units/trouble understanding  Adrian  Algebra  4  February 5th, 2012 01:00 PM 
Trouble solving a differential equation  rmas  Differential Equations  4  September 5th, 2011 08:16 PM 
complex numbers. solving for z  tosh.iba28  Abstract Algebra  1  July 29th, 2009 05:02 PM 
Having trouble solving a logarithm  Salient  Algebra  3  June 22nd, 2008 01:06 PM 