this is too easy!!
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# |& \1 f+ r1 E6 j+ X1. put 6 at each side.. take the one side which is heavier8 l' K& `* \& C" ^ K8 k
2. put 3 at each side.. also take the heavier side# G( t* k Z2 r8 y0 P3 B# S
3. put 1 at each side.. if the weight balance then the one not put inside is the heavy ball.. else the side which is heavier is the heavier ball.. |