How do you find the equivalent resistance here? (I realized it's a Wheatstone bridge, but it's unbalanced, so that doesn't help.) I tried using Kirchhoff's laws, but there is no cell given.
Answer
It looks like irreducible network - network which does not contain series or parallel connections that can be reduced.
You can add some voltage source to X and Y terminals and do mesh analysis.
It is explained in Wikipedia mesh analysis article, and also in this video by Darryl Morrel so I will not explain it here.
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