who can't figure out??????it's just basic math, primary school kid should already know it [-X
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1st: 6 vs 6, find out which side is heavier
|& I7 M: z3 M2nd: from the heavy side, 3 vs 3, find out which side is heavier
5 j! D( o8 r+ a3 u3rd: choose 2 out of 3 from the heavier side, if they weight the same, the 1 left is the one, if not, u can see it right away the heavier ball is on the 天秤 |