take 4 balls as a group, 3 groups - A B C公仔箱論壇1 I: D: Q4 H+ n7 X
weigh A & B (ex. B heavier)
; G& V- i! O: X/ l- P5 x5 ztvb now,tvbnow,bttvbthen weigh B & C (B & C same weight)6 w2 N9 M! n$ W
to find which group has the weight difference and find out is it (A is lighter)
% O1 s' C/ b4 s3 U% y5.39.217.77heavier or lightertvb now,tvbnow,bttvb; ?. @) {( u% D6 F% T4 c
then measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)
/ C: c9 [3 h) _" u. q/ p4 Rmeasure E vs F to find which 1 is lighter.... |