
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
January 30th, 2011, 10:21 PM  #1 
Senior Member Joined: Jan 2009 Posts: 345 Thanks: 3  What topic in math deals with reverse numbers?
What topic in math deals with the reversal of numbers. Say you have 123, the reversal of 123 would be 321. What math topic or Algebra topic deals with this? Thank you. 123 = 100+20+3 abc = 100a+10b+c cba = 100c+10b+a input > a b c output > c b a abcd...n_m where m is the mth integer in the string of numbers and n is the last number in the example above m = 3 and n = 3. n is the mth number of 3 is the 3rd number in 123 in 232425 5 is the 6th number in the string 232425. m=6 and n=5 abcd...xyzn_m = 10^(m1)a+10^(m2)b+10^(m3)c+10^(m4)d+...+10^(3)x+10^(2)y+10^(1)z+n nzyx...dcba_1. = 10^(m1)n+10^(m2)z+10^(m3)y+10^(m4)x+...+10^(3)d+10^(2)c+10^(1)b+a 
January 31st, 2011, 07:34 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 21,127 Thanks: 2336 
If you are interested in 123 and 321 as numerical values, the number base (by default, 10) matters and I would be inclined to select number theory rather than algebra.

January 31st, 2011, 07:52 AM  #3 
Global Moderator Joined: Nov 2009 From: Northwest Arkansas Posts: 2,767 Thanks: 5  Re: What topic in math deals with reverse numbers?
You might be interested in the wikipedia entries on "palindromic numbers" and the "lychrel process"


Tags 
deals, math, numbers, reverse, topic 
Search tags for this page 
Reverse numbers in number theory wikipedia,how reverse a number maths,reverse a number using math,wat is reverse numbers in maths,Maths reserve number,number reversal in maths,number reverse topic
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
what is the topic of auto regresive in math?  craftindo  Linear Algebra  0  March 10th, 2014 06:39 PM 
choosing my math thesis topic  ARTjoMS  Academic Guidance  0  April 9th, 2013 12:04 AM 
Precalculus knowledge for learning Discrete Math CS topic?  eindoofus  Applied Math  0  October 9th, 2012 12:28 PM 
reverse n  vdrn  Number Theory  28  October 22nd, 2011 05:07 PM 
Reverse Modulo  swtrse  Number Theory  2  August 6th, 2009 05:53 AM 