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You're given this circuit with each of the resistors being 5 ohms and are asked to find the total resistance between points F and G.

I imagined a 15V battery between those two points so I could get currents.

- Through the top loop from F to G I get 1A.

- Through the middle resistor and down through the bottom right resistor again I get 1.5A.

- Through the bottom left resistor I get 2A.

I (wrongly) conclude that the total current is 5.5A, then 15/5.5 = 2.72... -- not the right answer.

Any help would be much appreciated.

Much obliged,

Steve.