easy, one minutes i solve the problem
; q& {% w, B4 \6 p- d9 udivide into half, mean 6/ 6. t. u( ? h4 ]7 A" D1 d# s+ L: Q
take the heavier 6 ping pong/ B' U: t5 |' i5 [9 I$ m! A) n
divide into 3/3, take the heavier 3tvb now,tvbnow,bttvb W6 o, o& v! |7 M: e: \' K
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 |