1 weight 6 ping pongs with another 6 ping pongs. see which side is heavier
! g" Q: j) ~7 o0 C2 D" e, ?3 ATVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2 spilt the heavier side ping pongs in half and weight against each othertvb now,tvbnow,bttvb7 U( m% ]* ]7 J- W6 s$ [" n; ?) k/ Q
3 weiht either ping pongs one on one then you will know which is the heavy one. |