I'm asked to find a combination of resistors (parallel and/or series) that uses resistors of 25 Ω, 100 Ω, 50 Ω, and 50 Ω. They should add up to give a total resistance of 62.5 Ω.
Req for parallel = 1/R1 + 1/R2 + ...
Req for series = R1 + R2 + ...
The Attempt at a Solution
This seems like a relatively simple problem, but I've been unable to find a combination that gives the desired resistance. I noticed, however, that if the 50 Ω, 50 Ω, and 25 Ω resistors are placed in parallel, we get an equivalent resistance of 12.5 Ω, which may help in getting to the total of 62.5 Ω. I'm also required to use all the resistors.