easy, one minutes i solve the problem: y1 [0 I* C% q
divide into half, mean 6/ 65.39.217.775 C* d% }( g& b% B
take the heavier 6 ping pong, G7 E! s# {! X* @: x! v* w' h2 ]
divide into 3/3, take the heavier 3公仔箱論壇/ j C+ T8 _7 J& |! N% L0 B; F
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 |