easy, one minutes i solve the problem6 J8 X. D9 c7 I& k
divide into half, mean 6/ 6
. v* ~( }% Y' h5.39.217.77:8898take the heavier 6 ping pong. O' h1 x5 |( j8 b+ g9 T7 }9 l
divide into 3/3, take the heavier 3
: p. C; k9 B! E3 l+ r& M' Z5.39.217.77:8898take 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 |