Drexel dragonThe Math Forum

The Math Forum Internet Mathematics Library

Friedman Numbers

Library Home || Full Table of Contents || Library Help

Visit this site: http://www.stetson.edu/~efriedma/fn.html

Author:Erich Friedman
Description: A Friedman number is a number that can be written in some non-trivial way using its digits, the operations + - * / ^ and concatenation of digits. For example, 25 and 126 are Friedman numbers, since 25 = 5^2, and 126 = 6 * 21. Page includes a list of all the Friedman numbers with four or fewer digits; facts about Friedman numbers; and theorems and corollaries, with some proofs.

Levels: High School (9-12), College, Research
Languages: English
Resource Types: Recreations
Math Topics: Sequences and Sets

[Privacy Policy] [Terms of Use]

Home || The Math Library || Quick Reference || Search || Help

© 1994- The Math Forum at NCTM. All rights reserved.