easy, one minutes i solve the problem: y9 S( Z( \" N
divide into half, mean 6/ 6
4 _7 w4 {& R3 o, Z; m$ p1 }: \take the heavier 6 ping pong
5 i( { G2 [+ z7 ]tvb now,tvbnow,bttvbdivide into 3/3, take the heavier 3
3 U6 w" a6 S. F n* Vtvb now,tvbnow,bttvbtake 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 |