Is there a mathematical way to know the answer? (or you can do it only by trial and error)

Could you prove that it is possible or impossible mathematically?

# Electronic – How to arrange six 6-ohm resistors to have a total resistance of 6-ohm

resistors

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## Best Answer

^{simulate this circuit – Schematic created using CircuitLab}here R5//R1 series to R3 => 3 + 6 = 9 in one branch

R4 + R6 + R2 => 6 + 6 + 6 = 18 in 2nd branch

18 // 9 gives 6