You may also like

problem icon

Babylon Numbers

Can you make a hypothesis to explain these ancient numbers?

problem icon

Ishango Bone

Can you decode the mysterious markings on this ancient bone tool?

problem icon

Cuboid Challenge

What's the largest volume of box you can make from a square of paper?

Arithmagons

Age 14 to 16 Challenge Level:

How does the sum of the numbers at the edges relate to the sum of the numbers at the vertices?  

It might help to label the numbers at the vertices $A$, $B$ and $C$ and then express the edge numbers in terms of $A$, $B$ and $C$.