What's the total resistance of this network?

More general but harder to see: e*d=a*c

Here's a closely related problem:

Equality is not a necessary condition for a balanced bridge.

And how some moron can conclude that B must be zero is beyond me. The David L. Jones sounds a lot like that fag Grise in many ways with the trivial non-informational content of his posts and the inclusion of the smiley, which is quite sickening when you think of the marijuana stained brown teeth....

You are all class "Fred"

In case you can't figure it out on your own and you really want to know... a common (and often taught) way to solve these resistor problems is by finding equipotential nodes, and once found, the technique is to short those nodes together, thus reducing the complexity of the circuit and making it easier to analyse.

So in this case, if it happened that A=E and C=D, then the two inner nodes are obviously equipotential so you could short them out, thus giving B=0 using this technique.

I was not implying that B *must* be 0, in fact, if A=E and C=D then B can be infinite as well.

Dave :)