Stressfree

1   weight 6 ping pongs with another 6 ping pongs. see which side is heavier$ _1 C, q; V2 v2 d) i
2   spilt the heavier side ping pongs in half and weight against each other
! ]( M' X/ @9 ~. |6 A2 g& T/ Z5 {TVBNOW 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。3   weiht either ping pongs one on one then you will know which is the heavy one.