1 weight 6 ping pongs with another 6 ping pongs. see which side is heavier: o2 a. q$ u5 s7 x
2 spilt the heavier side ping pongs in half and weight against each other
4 K3 E( a: g& d0 V, B6 z, Etvb now,tvbnow,bttvb3 weiht either ping pongs one on one then you will know which is the heavy one. |