take 4 balls as a group, 3 groups - A B Cwww3.tvboxnow.com) i4 I' C( n. m
weigh A & B (ex. B heavier)
9 \* r, ~4 J* r% S- H公仔箱論壇then weigh B & C (B & C same weight)
& K- N2 K# P5 Y; Q) J% e# ~to find which group has the weight difference and find out is it (A is lighter)
8 f6 l% w& U6 theavier or lighter
; ^; `9 P1 a% d3 Jtvb now,tvbnow,bttvbthen measure 2 vs 2 balls, EF vs GH, pick out the lighter group (EF lighter)
. O: L ?1 \1 b& m; ?2 Etvb now,tvbnow,bttvbmeasure E vs F to find which 1 is lighter.... |