1 weight 6 ping pongs with another 6 ping pongs. see which side is heavier
, c& B: F5 b! E1 _( E, P1 P2 spilt the heavier side ping pongs in half and weight against each other7 ^& g8 i& N, [& [
3 weiht either ping pongs one on one then you will know which is the heavy one. |