1 weight 6 ping pongs with another 6 ping pongs. see which side is heavier
/ T+ U; h/ S+ I, f$ C' z E* _2 spilt the heavier side ping pongs in half and weight against each othertvb now,tvbnow,bttvb( ~; Q. P- E# c% E( U! g9 I
3 weiht either ping pongs one on one then you will know which is the heavy one. |