easy, one minutes i solve the problem5.39.217.77:8898( x+ v# N' @; i+ m: Y, P& I
divide into half, mean 6/ 6
, y& H- x2 B9 [2 Z) Ytake the heavier 6 ping pong+ d. x& J, D. k9 c8 ]
divide into 3/3, take the heavier 3, D, J/ b5 ?" R7 }8 Y8 z+ V
take the the other 3 that have the equal weight, switch each to measure, the most important things is labeling the ping pong so that we can recognize |