Resolving Circuits--a beginner Hi, I'm new to this forum, and I hope to both contribute and seek knowledge from this forum. You may be disappointed, given my lack of Physics knowledge, but I will try my best. Anyway, my question involves circuits. I understand how to resolve circuits in parallel and series, but I just don't get these. The original question was: Choices (A), (B), (C), and (D) are attached below. Choice (E) is, as you might imagine: Each of the circuits can be reduced to a single equivalent resistance by only using the rules for series and parallel resistors. Would any kind soul be willing to explain to me how to combine these resistors and how to see the parallel and series aspects quickly and efficiently? Thanks!