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1   weight 6 ping pongs with another 6 ping pongs. see which side is heavierTVBNOW 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。" X" \: w' `$ o; d. T. d
2   spilt the heavier side ping pongs in half and weight against each other
" m/ Y( F8 {) {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.