Here's the question, I have no idea what they are asking for an answer....

Any help is greatly appreciated.

Q#1- List all the resistance combinations possible using the three resistors 3, 9, and 18 ohms.

Q#2- Wheatstone bridge - Given R2/R1 ratio as 100 and known resistor 4.7 ohms. Find the unknown resistor.

 

Q1:

Find all the possible series, parallel and series-parallel combinations of the resistors values given (and maybe each combination result in a different equivalent resistance).

Q2:

Depending where the unknown resistor is located (high side or low side of the bridge):

100=4.7K/R

or

100=R/4.7K

 

Q1 strictly don't forget to include the cases of only single resistors and two resistors. These combinations are possible because you could have a combination with all three but have one or two shorted out.