easy, one minutes i solve the problemtvb now,tvbnow,bttvb: p9 [7 j& G* V
divide into half, mean 6/ 6
1 c1 {4 S0 t4 B' Ytake the heavier 6 ping pong
' B5 _, n9 i+ V0 Adivide into 3/3, take the heavier 3
$ p h6 Q$ W8 N. W6 }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 |