Methids of finding equivalent resistance

Find equivalent resistance ?

Find equivalent Resistance

Find equivalent Resistance

An infinite network of resistances has been made as shown in the figure. Each resistance is R. find the equivalent resistance between A and B.

The network of resistors. Find the equivalent resistance between points A and D.

In the circuit shown in figure find the equivalent resistance across points A and B.

In previous illustration, find the equivalent resistance of the network between 1 and 2.

12 wires of different resistances are connected as shown. Find the equivalent resistance A and F.

What is the ratio of equivalent resistance of series combination of n equal resistance to the equivalent resistance in parallel combination of these n resistances ?