easy, one minutes i solve the problemtvb now,tvbnow,bttvb/ O$ Q9 c) _+ l, i- h- x3 d: Q
divide into half, mean 6/ 6
/ H$ z! A* M. n; ^1 }! Wtake the heavier 6 ping pong
9 l* P1 H/ M. b" @: c3 [divide into 3/3, take the heavier 3
9 C8 S9 U( C% Dtake 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 |