easy, one minutes i solve the problem
6 R% F2 y# d: Y$ _4 T- k公仔箱論壇divide into half, mean 6/ 6
# @9 q! w, C" N4 ~% K公仔箱論壇take the heavier 6 ping pong
( M8 y+ F! I% _8 r8 H9 W- ~% Zdivide into 3/3, take the heavier 3
; g) U# Y! C' M$ {take the the other 3 that have the equal weight, switch each to measure, the most important things is labeling the ping pong so that we can recognize |