1 weight 6 ping pongs with another 6 ping pongs. see which side is heavier
0 S9 g" _, Y$ d" stvb now,tvbnow,bttvb2 spilt the heavier side ping pongs in half and weight against each otherTVBNOW 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。 q! W. i2 r/ r: ~2 {, y P5 `
3 weiht either ping pongs one on one then you will know which is the heavy one. |