easy, one minutes i solve the problem
# j, Y8 k7 ~5 S) O5.39.217.76divide into half, mean 6/ 65.39.217.765 `2 |4 L8 O- j$ B9 z( V4 i. S
take the heavier 6 ping pong9 q! C+ I* v- Y/ d/ B) r& f, S
divide into 3/3, take the heavier 3
7 a. w" l& B$ q- m& k% mtake 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 |