How to find effective resistance in a circuit.

[Aceix]

Question: Problem 1 of the attachment.
https://drive.google.com/file/d/0B72RSYQDrg1vcm84SmxFcjhyOFk/view?usp=docslist_api

Homework Equations

For parallel resistors: 1/R=1/R1 +1/R2

The Attempt at a Solution

I am sure the resistors are not in series but they also don't look convincing enough to be parallel. I am stuck.

 

[mfb]

You can draw them with a clearer arrangement, then some symmetry will be visible.
Alternatively, just check resistor by resistor: where is one side connected to? Where the other? Is this the same for any other resistor?

 

[Aceix]

You can draw them with a clearer arrangement, then some symmetry will be visible.
Alternatively, just check resistor by resistor: where is one side connected to? Where the other? Is this the same for any other resistor?

You can draw them with a clearer arrangement, then some symmetry will be visible.
Alternatively, just check

You can draw them with a clearer arrangement, then some symmetry will be visible.
Alternatively, just check resistor by resistor: where is one side connected to? Where the other? Is this the same for any other resistor?

I've tried all that to no avail. Pls check the link.

 

[mfb]

I've tried all that to no avail.

Show your work please.

 

[Aceix]

Simplified: https://drive.google.com/file/d/0B72RSYQDrg1vUlVpMVpJRlNnenc/view?usp=docslist_api

 

[mfb]

That is not simplified, it is the same diagram as in the problem statement.

The 1 Ohm resistor got 100 Ohms for some reason?