Question

Given three resistors of 9 ohm which should be connected to give 13.5 ohm & 6 ohm?

Answer 1

Here is your answer.....

To get a resistance of 13.5 ohm, two resistors should be connected in parallel then the resistance will come 4.5 ohm and the other one in series.
So 4.5 + 9 = 13.5 ohm

To get a resistance of 6 ohm, two resistors should be connected in series then the resistance will come 18 ohm and the other one in parallel
So 1/R = 1/18 + 1/9
1/R = 3/18
R = 18/3
R = 6 ohm

HOPE IT HELPED YOU....
(^_^)