who can't figure out??????it's just basic math, primary school kid should already know it [-X
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9 K+ a4 r6 _' c. a2 h! f1st: 6 vs 6, find out which side is heavier
0 T2 y d' K# ? T+ ~: [: J8 i" J3 utvb now,tvbnow,bttvb2nd: from the heavy side, 3 vs 3, find out which side is heavier
) M; ^3 \, B. P# X* L2 [3rd: 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 |