easy, one minutes i solve the problem
1 Q" d1 k1 O D3 W# M# qdivide into half, mean 6/ 6
% G N& O4 D: jtake the heavier 6 ping pong
# d) |! B' X( o9 Edivide into 3/3, take the heavier 3# S: w- m" Z& H$ D7 E3 \) B
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 |