easy, one minutes i solve the problem
( e8 c4 v: Q* K- u6 hdivide into half, mean 6/ 6& G4 V! }3 b; N, O
take the heavier 6 ping pong
7 Q* L6 t5 O9 Z& [divide into 3/3, take the heavier 3" ?' }# O2 w# o
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 |