Stage: 4 Challenge Level: 
What is the very simplest graph you can think of? How many edges
and vertices does it have?
Combinatorics. Generalising. Mathematical reasoning & proof. Stage 5 - Reviewed 2012. Inequality/inequalities. Networks/Graph Theory. Patterned numbers. Manipulating algebraic expressions/formulae. Number theory. Dynamical systems.
Published January 2003.
Copyright © 2007. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk