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- N balls and a scale 4 answers
You are given 8 equal sized bars of silver labeled a to h. You know for a fact one of them is fake, and the only measurable difference is weight. However you do not know if the fake bar is heavier or lighter. You are also given a balance scale which can be used to compare weight between two bars or sets of bars. However, you are restricted to using the scale only twice. Find the fake one in 2 weighing. Given: Bars e,f,g,h are collectively lighter than bars a,b,c,d.