What is the minimum resistance which can be made using five resistors each of 1/5

The minimum resistance to the flow of electrical current is achieved when the resistors are connected in parallel, just as the minimum resistance to the flow of vehicular traffic is achieved when several lanes are built in parallel.When 5 equal resistors are connected in parallel, the net resistance of their combination is just 1/5 of the value of each one.  So 5 equal resistors in parallel, each with a resistance of 1/5 ohm, have a combined net resistance 0f 1/25 ohm.