1 weight 6 ping pongs with another 6 ping pongs. see which side is heavier公仔箱論壇, c9 ~3 h5 o# c9 \
2 spilt the heavier side ping pongs in half and weight against each other
2 s7 f1 z* d0 J) l1 _tvb now,tvbnow,bttvb3 weiht either ping pongs one on one then you will know which is the heavy one. |