1 weight 6 ping pongs with another 6 ping pongs. see which side is heavier
& Q3 P+ v6 {! \7 @公仔箱論壇2 spilt the heavier side ping pongs in half and weight against each othertvb now,tvbnow,bttvb* E: N, y6 E j( q' P
3 weiht either ping pongs one on one then you will know which is the heavy one. |