easy, one minutes i solve the problem
% A! W$ P! w- f2 xdivide into half, mean 6/ 6公仔箱論壇9 T( S$ p/ P3 ?' T7 Z0 A) F
take the heavier 6 ping pong
! M2 Q7 m: `# D: y$ t5.39.217.76divide into 3/3, take the heavier 3: g% u$ d D# N% a: R4 R2 L5 X' D
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 |