easy, one minutes i solve the problem
5 N* z4 T* @& |$ { P* {公仔箱論壇divide into half, mean 6/ 6
1 A5 i. L1 n# j, l. w+ f公仔箱論壇take the heavier 6 ping pong
( s+ h3 w- w$ w/ V7 bdivide into 3/3, take the heavier 3公仔箱論壇1 W' x6 R- \3 r% u( E
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 |